20987658

素因数分解:

$2^1\times 3^2\times {\mathrm{37}}^1\times {\mathrm{31513}}^1$

素因数の和:31558

約数の個数: 24

約数和(自身を含む): 46703748

約数和(自身を除く): 25716090

約数列:

[1, 2, 3, 6, 9, 18, 37, 74, 111, 222, 333, 666, 31513, 63026, 94539, 189078, 283617, 567234, 1165981, 2331962, 3497943, 6995886, 10493829, 20987658]

約数ペア:

[(1, 20987658), (2, 10493829), (3, 6995886), (6, 3497943), (9, 2331962), (18, 1165981), (37, 567234), (74, 283617), (111, 189078), (222, 94539), (333, 63026), (666, 31513)]