20551720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{2531}}^1$

素因数の和:2578

約数の個数: 64

約数和(自身を含む): 54691200

約数和(自身を除く): 34139480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 29, 35, 40, 56, 58, 70, 116, 140, 145, 203, 232, 280, 290, 406, 580, 812, 1015, 1160, 1624, 2030, 2531, 4060, 5062, 8120, 10124, 12655, 17717, 20248, 25310, 35434, 50620, 70868, 73399, 88585, 101240, 141736, 146798, 177170, 293596, 354340, 366995, 513793, 587192, 708680, 733990, 1027586, 1467980, 2055172, 2568965, 2935960, 4110344, 5137930, 10275860, 20551720]

約数ペア:

[(1, 20551720), (2, 10275860), (4, 5137930), (5, 4110344), (7, 2935960), (8, 2568965), (10, 2055172), (14, 1467980), (20, 1027586), (28, 733990), (29, 708680), (35, 587192), (40, 513793), (56, 366995), (58, 354340), (70, 293596), (116, 177170), (140, 146798), (145, 141736), (203, 101240), (232, 88585), (280, 73399), (290, 70868), (406, 50620), (580, 35434), (812, 25310), (1015, 20248), (1160, 17717), (1624, 12655), (2030, 10124), (2531, 8120), (4060, 5062)]