31288520

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{18191}}^1$

素因数の和:18245

約数の個数: 32

約数和(自身を含む): 72040320

約数和(自身を除く): 40751800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 18191, 36382, 72764, 90955, 145528, 181910, 363820, 727640, 782213, 1564426, 3128852, 3911065, 6257704, 7822130, 15644260, 31288520]

約数ペア:

[(1, 31288520), (2, 15644260), (4, 7822130), (5, 6257704), (8, 3911065), (10, 3128852), (20, 1564426), (40, 782213), (43, 727640), (86, 363820), (172, 181910), (215, 145528), (344, 90955), (430, 72764), (860, 36382), (1720, 18191)]