1815981320

素因数分解:

$2^3\times 5^1\times {\mathrm{157}}^1\times {\mathrm{289169}}^1$

素因数の和:289337

約数の個数: 32

約数和(自身を含む): 4111997400

約数和(自身を除く): 2296016080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 157, 314, 628, 785, 1256, 1570, 3140, 6280, 289169, 578338, 1156676, 1445845, 2313352, 2891690, 5783380, 11566760, 45399533, 90799066, 181598132, 226997665, 363196264, 453995330, 907990660, 1815981320]

約数ペア:

[(1, 1815981320), (2, 907990660), (4, 453995330), (5, 363196264), (8, 226997665), (10, 181598132), (20, 90799066), (40, 45399533), (157, 11566760), (314, 5783380), (628, 2891690), (785, 2313352), (1256, 1445845), (1570, 1156676), (3140, 578338), (6280, 289169)]