21210320

素因数分解:

$2^4\times 5^1\times {\mathrm{265129}}^1$

素因数の和:265142

約数の個数: 20

約数和(自身を含む): 49314180

約数和(自身を除く): 28103860

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 265129, 530258, 1060516, 1325645, 2121032, 2651290, 4242064, 5302580, 10605160, 21210320]

約数ペア:

[(1, 21210320), (2, 10605160), (4, 5302580), (5, 4242064), (8, 2651290), (10, 2121032), (16, 1325645), (20, 1060516), (40, 530258), (80, 265129)]