217090420

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{137399}}^1$

素因数の和:137487

約数の個数: 24

約数和(自身を含む): 461664000

約数和(自身を除く): 244573580

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 137399, 274798, 549596, 686995, 1373990, 2747980, 10854521, 21709042, 43418084, 54272605, 108545210, 217090420]

約数ペア:

[(1, 217090420), (2, 108545210), (4, 54272605), (5, 43418084), (10, 21709042), (20, 10854521), (79, 2747980), (158, 1373990), (316, 686995), (395, 549596), (790, 274798), (1580, 137399)]