18211280

素因数分解:

$2^4\times 5^1\times {\mathrm{233}}^1\times {\mathrm{977}}^1$

素因数の和:1223

約数の個数: 40

約数和(自身を含む): 42566472

約数和(自身を除く): 24355192

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 233, 466, 932, 977, 1165, 1864, 1954, 2330, 3728, 3908, 4660, 4885, 7816, 9320, 9770, 15632, 18640, 19540, 39080, 78160, 227641, 455282, 910564, 1138205, 1821128, 2276410, 3642256, 4552820, 9105640, 18211280]

約数ペア:

[(1, 18211280), (2, 9105640), (4, 4552820), (5, 3642256), (8, 2276410), (10, 1821128), (16, 1138205), (20, 910564), (40, 455282), (80, 227641), (233, 78160), (466, 39080), (932, 19540), (977, 18640), (1165, 15632), (1864, 9770), (1954, 9320), (2330, 7816), (3728, 4885), (3908, 4660)]