21074320

素因数分解:

$2^4\times 5^1\times {\mathrm{263429}}^1$

素因数の和:263442

約数の個数: 20

約数和(自身を含む): 48997980

約数和(自身を除く): 27923660

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 263429, 526858, 1053716, 1317145, 2107432, 2634290, 4214864, 5268580, 10537160, 21074320]

約数ペア:

[(1, 21074320), (2, 10537160), (4, 5268580), (5, 4214864), (8, 2634290), (10, 2107432), (16, 1317145), (20, 1053716), (40, 526858), (80, 263429)]