391142680

素因数分解:

$2^3\times 5^1\times {\mathrm{421}}^1\times {\mathrm{23227}}^1$

素因数の和:23659

約数の個数: 32

約数和(自身を含む): 882199440

約数和(自身を除く): 491056760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 421, 842, 1684, 2105, 3368, 4210, 8420, 16840, 23227, 46454, 92908, 116135, 185816, 232270, 464540, 929080, 9778567, 19557134, 39114268, 48892835, 78228536, 97785670, 195571340, 391142680]

約数ペア:

[(1, 391142680), (2, 195571340), (4, 97785670), (5, 78228536), (8, 48892835), (10, 39114268), (20, 19557134), (40, 9778567), (421, 929080), (842, 464540), (1684, 232270), (2105, 185816), (3368, 116135), (4210, 92908), (8420, 46454), (16840, 23227)]