20530840

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{1609}}^1$

素因数の和:1660

約数の個数: 64

約数和(自身を含む): 52164000

約数和(自身を除く): 31633160

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 29, 40, 44, 55, 58, 88, 110, 116, 145, 220, 232, 290, 319, 440, 580, 638, 1160, 1276, 1595, 1609, 2552, 3190, 3218, 6380, 6436, 8045, 12760, 12872, 16090, 17699, 32180, 35398, 46661, 64360, 70796, 88495, 93322, 141592, 176990, 186644, 233305, 353980, 373288, 466610, 513271, 707960, 933220, 1026542, 1866440, 2053084, 2566355, 4106168, 5132710, 10265420, 20530840]

約数ペア:

[(1, 20530840), (2, 10265420), (4, 5132710), (5, 4106168), (8, 2566355), (10, 2053084), (11, 1866440), (20, 1026542), (22, 933220), (29, 707960), (40, 513271), (44, 466610), (55, 373288), (58, 353980), (88, 233305), (110, 186644), (116, 176990), (145, 141592), (220, 93322), (232, 88495), (290, 70796), (319, 64360), (440, 46661), (580, 35398), (638, 32180), (1160, 17699), (1276, 16090), (1595, 12872), (1609, 12760), (2552, 8045), (3190, 6436), (3218, 6380)]