215231320

素因数分解:

$2^3\times 5^1\times {\mathrm{313}}^1\times {\mathrm{17191}}^1$

素因数の和:17515

約数の個数: 32

約数和(自身を含む): 485845920

約数和(自身を除く): 270614600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 313, 626, 1252, 1565, 2504, 3130, 6260, 12520, 17191, 34382, 68764, 85955, 137528, 171910, 343820, 687640, 5380783, 10761566, 21523132, 26903915, 43046264, 53807830, 107615660, 215231320]

約数ペア:

[(1, 215231320), (2, 107615660), (4, 53807830), (5, 43046264), (8, 26903915), (10, 21523132), (20, 10761566), (40, 5380783), (313, 687640), (626, 343820), (1252, 171910), (1565, 137528), (2504, 85955), (3130, 68764), (6260, 34382), (12520, 17191)]