20565675

素因数分解:

$3^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{89}}^1$

素因数の和:197

約数の個数: 72

約数和(自身を含む): 40622400

約数和(自身を除く): 20056725

約数列:

[1, 3, 5, 9, 13, 15, 25, 39, 45, 65, 75, 79, 89, 117, 195, 225, 237, 267, 325, 395, 445, 585, 711, 801, 975, 1027, 1157, 1185, 1335, 1975, 2225, 2925, 3081, 3471, 3555, 4005, 5135, 5785, 5925, 6675, 7031, 9243, 10413, 15405, 17355, 17775, 20025, 21093, 25675, 28925, 35155, 46215, 52065, 63279, 77025, 86775, 91403, 105465, 175775, 231075, 260325, 274209, 316395, 457015, 527325, 822627, 1371045, 1581975, 2285075, 4113135, 6855225, 20565675]

約数ペア:

[(1, 20565675), (3, 6855225), (5, 4113135), (9, 2285075), (13, 1581975), (15, 1371045), (25, 822627), (39, 527325), (45, 457015), (65, 316395), (75, 274209), (79, 260325), (89, 231075), (117, 175775), (195, 105465), (225, 91403), (237, 86775), (267, 77025), (325, 63279), (395, 52065), (445, 46215), (585, 35155), (711, 28925), (801, 25675), (975, 21093), (1027, 20025), (1157, 17775), (1185, 17355), (1335, 15405), (1975, 10413), (2225, 9243), (2925, 7031), (3081, 6675), (3471, 5925), (3555, 5785), (4005, 5135)]