643376

素因数分解:

$2^4\times {\mathrm{79}}^1\times {\mathrm{509}}^1$

素因数の和:596

約数の個数: 20

約数和(自身を含む): 1264800

約数和(自身を除く): 621424

約数列:

[1, 2, 4, 8, 16, 79, 158, 316, 509, 632, 1018, 1264, 2036, 4072, 8144, 40211, 80422, 160844, 321688, 643376]

約数ペア:

[(1, 643376), (2, 321688), (4, 160844), (8, 80422), (16, 40211), (79, 8144), (158, 4072), (316, 2036), (509, 1264), (632, 1018)]