20643915

素因数分解:

$3^1\times 5^1\times {\mathrm{313}}^1\times {\mathrm{4397}}^1$

素因数の和:4718

約数の個数: 16

約数和(自身を含む): 33143328

約数和(自身を除く): 12499413

約数列:

[1, 3, 5, 15, 313, 939, 1565, 4397, 4695, 13191, 21985, 65955, 1376261, 4128783, 6881305, 20643915]

約数ペア:

[(1, 20643915), (3, 6881305), (5, 4128783), (15, 1376261), (313, 65955), (939, 21985), (1565, 13191), (4397, 4695)]