21679240

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{1699}}^1$

素因数の和:1750

約数の個数: 64

約数和(自身を含む): 55080000

約数和(自身を除く): 33400760

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, 1699, 2552, 3190, 3398, 6380, 6796, 8495, 12760, 13592, 16990, 18689, 33980, 37378, 49271, 67960, 74756, 93445, 98542, 149512, 186890, 197084, 246355, 373780, 394168, 492710, 541981, 747560, 985420, 1083962, 1970840, 2167924, 2709905, 4335848, 5419810, 10839620, 21679240]

約数ペア:

[(1, 21679240), (2, 10839620), (4, 5419810), (5, 4335848), (8, 2709905), (10, 2167924), (11, 1970840), (20, 1083962), (22, 985420), (29, 747560), (40, 541981), (44, 492710), (55, 394168), (58, 373780), (88, 246355), (110, 197084), (116, 186890), (145, 149512), (220, 98542), (232, 93445), (290, 74756), (319, 67960), (440, 49271), (580, 37378), (638, 33980), (1160, 18689), (1276, 16990), (1595, 13592), (1699, 12760), (2552, 8495), (3190, 6796), (3398, 6380)]