20778113480

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{229}}^1\times {\mathrm{277}}^1\times {\mathrm{431}}^1$

素因数の和:967

約数の個数: 128

約数和(自身を含む): 49719744000

約数和(自身を除く): 28941630520

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 229, 277, 380, 431, 458, 554, 760, 862, 916, 1108, 1145, 1385, 1724, 1832, 2155, 2216, 2290, 2770, 3448, 4310, 4351, 4580, 5263, 5540, 8189, 8620, 8702, 9160, 10526, 11080, 16378, 17240, 17404, 21052, 21755, 26315, 32756, 34808, 40945, 42104, 43510, 52630, 63433, 65512, 81890, 87020, 98699, 105260, 119387, 126866, 163780, 174040, 197398, 210520, 238774, 253732, 317165, 327560, 394796, 477548, 493495, 507464, 596935, 634330, 789592, 955096, 986990, 1193870, 1205227, 1268660, 1875281, 1973980, 2268353, 2387740, 2410454, 2537320, 3750562, 3947960, 4536706, 4775480, 4820908, 6026135, 7501124, 9073412, 9376405, 9641816, 11341765, 12052270, 15002248, 18146824, 18752810, 22683530, 24104540, 27339623, 37505620, 45367060, 48209080, 54679246, 75011240, 90734120, 109358492, 136698115, 218716984, 273396230, 519452837, 546792460, 1038905674, 1093584920, 2077811348, 2597264185, 4155622696, 5194528370, 10389056740, 20778113480]

約数ペア:

[(1, 20778113480), (2, 10389056740), (4, 5194528370), (5, 4155622696), (8, 2597264185), (10, 2077811348), (19, 1093584920), (20, 1038905674), (38, 546792460), (40, 519452837), (76, 273396230), (95, 218716984), (152, 136698115), (190, 109358492), (229, 90734120), (277, 75011240), (380, 54679246), (431, 48209080), (458, 45367060), (554, 37505620), (760, 27339623), (862, 24104540), (916, 22683530), (1108, 18752810), (1145, 18146824), (1385, 15002248), (1724, 12052270), (1832, 11341765), (2155, 9641816), (2216, 9376405), (2290, 9073412), (2770, 7501124), (3448, 6026135), (4310, 4820908), (4351, 4775480), (4580, 4536706), (5263, 3947960), (5540, 3750562), (8189, 2537320), (8620, 2410454), (8702, 2387740), (9160, 2268353), (10526, 1973980), (11080, 1875281), (16378, 1268660), (17240, 1205227), (17404, 1193870), (21052, 986990), (21755, 955096), (26315, 789592), (32756, 634330), (34808, 596935), (40945, 507464), (42104, 493495), (43510, 477548), (52630, 394796), (63433, 327560), (65512, 317165), (81890, 253732), (87020, 238774), (98699, 210520), (105260, 197398), (119387, 174040), (126866, 163780)]