398667040

素因数分解:

$2^5\times 5^1\times {\mathrm{2491669}}^1$

素因数の和:2491684

約数の個数: 24

約数和(自身を含む): 941851260

約数和(自身を除く): 543184220

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 2491669, 4983338, 9966676, 12458345, 19933352, 24916690, 39866704, 49833380, 79733408, 99666760, 199333520, 398667040]

約数ペア:

[(1, 398667040), (2, 199333520), (4, 99666760), (5, 79733408), (8, 49833380), (10, 39866704), (16, 24916690), (20, 19933352), (32, 12458345), (40, 9966676), (80, 4983338), (160, 2491669)]