21570160

素因数分解:

$2^4\times 5^1\times {\mathrm{79}}^1\times {\mathrm{3413}}^1$

素因数の和:3505

約数の個数: 40

約数和(自身を含む): 50800320

約数和(自身を除く): 29230160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 79, 80, 158, 316, 395, 632, 790, 1264, 1580, 3160, 3413, 6320, 6826, 13652, 17065, 27304, 34130, 54608, 68260, 136520, 269627, 273040, 539254, 1078508, 1348135, 2157016, 2696270, 4314032, 5392540, 10785080, 21570160]

約数ペア:

[(1, 21570160), (2, 10785080), (4, 5392540), (5, 4314032), (8, 2696270), (10, 2157016), (16, 1348135), (20, 1078508), (40, 539254), (79, 273040), (80, 269627), (158, 136520), (316, 68260), (395, 54608), (632, 34130), (790, 27304), (1264, 17065), (1580, 13652), (3160, 6826), (3413, 6320)]