21201478520

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{12326441}}^1$

素因数の和:12326495

約数の個数: 32

約数和(自身を含む): 48812710320

約数和(自身を除く): 27611231800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 12326441, 24652882, 49305764, 61632205, 98611528, 123264410, 246528820, 493057640, 530036963, 1060073926, 2120147852, 2650184815, 4240295704, 5300369630, 10600739260, 21201478520]

約数ペア:

[(1, 21201478520), (2, 10600739260), (4, 5300369630), (5, 4240295704), (8, 2650184815), (10, 2120147852), (20, 1060073926), (40, 530036963), (43, 493057640), (86, 246528820), (172, 123264410), (215, 98611528), (344, 61632205), (430, 49305764), (860, 24652882), (1720, 12326441)]