20156840

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{751}}^1$

素因数の和:834

約数の個数: 64

約数和(自身を含む): 50353920

約数和(自身を除く): 30197080

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 61, 88, 110, 122, 220, 244, 305, 440, 488, 610, 671, 751, 1220, 1342, 1502, 2440, 2684, 3004, 3355, 3755, 5368, 6008, 6710, 7510, 8261, 13420, 15020, 16522, 26840, 30040, 33044, 41305, 45811, 66088, 82610, 91622, 165220, 183244, 229055, 330440, 366488, 458110, 503921, 916220, 1007842, 1832440, 2015684, 2519605, 4031368, 5039210, 10078420, 20156840]

約数ペア:

[(1, 20156840), (2, 10078420), (4, 5039210), (5, 4031368), (8, 2519605), (10, 2015684), (11, 1832440), (20, 1007842), (22, 916220), (40, 503921), (44, 458110), (55, 366488), (61, 330440), (88, 229055), (110, 183244), (122, 165220), (220, 91622), (244, 82610), (305, 66088), (440, 45811), (488, 41305), (610, 33044), (671, 30040), (751, 26840), (1220, 16522), (1342, 15020), (1502, 13420), (2440, 8261), (2684, 7510), (3004, 6710), (3355, 6008), (3755, 5368)]