20721036375

素因数分解:

$3^2\times 5^3\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{229}}^1\times {\mathrm{269}}^1$

素因数の和:555

約数の個数: 192

約数和(自身を含む): 42315436800

約数和(自身を除く): 21594400425

約数列:

[1, 3, 5, 9, 13, 15, 23, 25, 39, 45, 65, 69, 75, 115, 117, 125, 195, 207, 225, 229, 269, 299, 325, 345, 375, 575, 585, 687, 807, 897, 975, 1035, 1125, 1145, 1345, 1495, 1625, 1725, 2061, 2421, 2691, 2875, 2925, 2977, 3435, 3497, 4035, 4485, 4875, 5175, 5267, 5725, 6187, 6725, 7475, 8625, 8931, 10305, 10491, 12105, 13455, 14625, 14885, 15801, 17175, 17485, 18561, 20175, 22425, 25875, 26335, 26793, 28625, 30935, 31473, 33625, 37375, 44655, 47403, 51525, 52455, 55683, 60525, 61601, 67275, 68471, 74425, 79005, 80431, 85875, 87425, 92805, 100875, 112125, 131675, 133965, 154675, 157365, 184803, 205413, 223275, 237015, 241293, 257625, 262275, 278415, 302625, 308005, 336375, 342355, 372125, 395025, 402155, 437125, 464025, 554409, 616239, 658375, 669825, 723879, 773375, 786825, 800813, 924015, 1027065, 1116375, 1185075, 1206465, 1311375, 1392075, 1416823, 1540025, 1711775, 1975125, 2010775, 2320125, 2402439, 2772045, 3081195, 3349125, 3619395, 3934125, 4004065, 4250469, 4620075, 5135325, 5925375, 6032325, 6960375, 7084115, 7207317, 7700125, 8558875, 10053875, 12012195, 12751407, 13860225, 15405975, 18096975, 18418699, 20020325, 21252345, 23100375, 25676625, 30161625, 35420575, 36036585, 55256097, 60060975, 63757035, 69301125, 77029875, 90484875, 92093495, 100101625, 106261725, 165768291, 177102875, 180182925, 276280485, 300304875, 318785175, 460467475, 531308625, 828841455, 900914625, 1381402425, 1593925875, 2302337375, 4144207275, 6907012125, 20721036375]

約数ペア:

[(1, 20721036375), (3, 6907012125), (5, 4144207275), (9, 2302337375), (13, 1593925875), (15, 1381402425), (23, 900914625), (25, 828841455), (39, 531308625), (45, 460467475), (65, 318785175), (69, 300304875), (75, 276280485), (115, 180182925), (117, 177102875), (125, 165768291), (195, 106261725), (207, 100101625), (225, 92093495), (229, 90484875), (269, 77029875), (299, 69301125), (325, 63757035), (345, 60060975), (375, 55256097), (575, 36036585), (585, 35420575), (687, 30161625), (807, 25676625), (897, 23100375), (975, 21252345), (1035, 20020325), (1125, 18418699), (1145, 18096975), (1345, 15405975), (1495, 13860225), (1625, 12751407), (1725, 12012195), (2061, 10053875), (2421, 8558875), (2691, 7700125), (2875, 7207317), (2925, 7084115), (2977, 6960375), (3435, 6032325), (3497, 5925375), (4035, 5135325), (4485, 4620075), (4875, 4250469), (5175, 4004065), (5267, 3934125), (5725, 3619395), (6187, 3349125), (6725, 3081195), (7475, 2772045), (8625, 2402439), (8931, 2320125), (10305, 2010775), (10491, 1975125), (12105, 1711775), (13455, 1540025), (14625, 1416823), (14885, 1392075), (15801, 1311375), (17175, 1206465), (17485, 1185075), (18561, 1116375), (20175, 1027065), (22425, 924015), (25875, 800813), (26335, 786825), (26793, 773375), (28625, 723879), (30935, 669825), (31473, 658375), (33625, 616239), (37375, 554409), (44655, 464025), (47403, 437125), (51525, 402155), (52455, 395025), (55683, 372125), (60525, 342355), (61601, 336375), (67275, 308005), (68471, 302625), (74425, 278415), (79005, 262275), (80431, 257625), (85875, 241293), (87425, 237015), (92805, 223275), (100875, 205413), (112125, 184803), (131675, 157365), (133965, 154675)]