19719640

素因数分解:

$2^3\times 5^1\times {\mathrm{421}}^1\times {\mathrm{1171}}^1$

素因数の和:1603

約数の個数: 32

約数和(自身を含む): 44512560

約数和(自身を除く): 24792920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 421, 842, 1171, 1684, 2105, 2342, 3368, 4210, 4684, 5855, 8420, 9368, 11710, 16840, 23420, 46840, 492991, 985982, 1971964, 2464955, 3943928, 4929910, 9859820, 19719640]

約数ペア:

[(1, 19719640), (2, 9859820), (4, 4929910), (5, 3943928), (8, 2464955), (10, 1971964), (20, 985982), (40, 492991), (421, 46840), (842, 23420), (1171, 16840), (1684, 11710), (2105, 9368), (2342, 8420), (3368, 5855), (4210, 4684)]