720322580

素因数分解:

$2^2\times 5^1\times {\mathrm{421}}^1\times {\mathrm{85549}}^1$

素因数の和:85979

約数の個数: 24

約数和(自身を含む): 1516288200

約数和(自身を除く): 795965620

約数列:

[1, 2, 4, 5, 10, 20, 421, 842, 1684, 2105, 4210, 8420, 85549, 171098, 342196, 427745, 855490, 1710980, 36016129, 72032258, 144064516, 180080645, 360161290, 720322580]

約数ペア:

[(1, 720322580), (2, 360161290), (4, 180080645), (5, 144064516), (10, 72032258), (20, 36016129), (421, 1710980), (842, 855490), (1684, 427745), (2105, 342196), (4210, 171098), (8420, 85549)]