21002960

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{823}}^1$

素因数の和:876

約数の個数: 80

約数和(自身を含む): 55175040

約数和(自身を除く): 34172080

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 29, 40, 44, 55, 58, 80, 88, 110, 116, 145, 176, 220, 232, 290, 319, 440, 464, 580, 638, 823, 880, 1160, 1276, 1595, 1646, 2320, 2552, 3190, 3292, 4115, 5104, 6380, 6584, 8230, 9053, 12760, 13168, 16460, 18106, 23867, 25520, 32920, 36212, 45265, 47734, 65840, 72424, 90530, 95468, 119335, 144848, 181060, 190936, 238670, 262537, 362120, 381872, 477340, 525074, 724240, 954680, 1050148, 1312685, 1909360, 2100296, 2625370, 4200592, 5250740, 10501480, 21002960]

約数ペア:

[(1, 21002960), (2, 10501480), (4, 5250740), (5, 4200592), (8, 2625370), (10, 2100296), (11, 1909360), (16, 1312685), (20, 1050148), (22, 954680), (29, 724240), (40, 525074), (44, 477340), (55, 381872), (58, 362120), (80, 262537), (88, 238670), (110, 190936), (116, 181060), (145, 144848), (176, 119335), (220, 95468), (232, 90530), (290, 72424), (319, 65840), (440, 47734), (464, 45265), (580, 36212), (638, 32920), (823, 25520), (880, 23867), (1160, 18106), (1276, 16460), (1595, 13168), (1646, 12760), (2320, 9053), (2552, 8230), (3190, 6584), (3292, 6380), (4115, 5104)]