18191780

素因数分解:

$2^2\times 5^1\times {\mathrm{227}}^1\times {\mathrm{4007}}^1$

素因数の和:4243

約数の個数: 24

約数和(自身を含む): 38380608

約数和(自身を除く): 20188828

約数列:

[1, 2, 4, 5, 10, 20, 227, 454, 908, 1135, 2270, 4007, 4540, 8014, 16028, 20035, 40070, 80140, 909589, 1819178, 3638356, 4547945, 9095890, 18191780]

約数ペア:

[(1, 18191780), (2, 9095890), (4, 4547945), (5, 3638356), (10, 1819178), (20, 909589), (227, 80140), (454, 40070), (908, 20035), (1135, 16028), (2270, 8014), (4007, 4540)]