18321905

素因数分解:

$5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1\times {\mathrm{101}}^1$

素因数の和:257

約数の個数: 32

約数和(自身を含む): 26085888

約数和(自身を除く): 7763983

約数列:

[1, 5, 7, 35, 71, 73, 101, 355, 365, 497, 505, 511, 707, 2485, 2555, 3535, 5183, 7171, 7373, 25915, 35855, 36281, 36865, 50197, 51611, 181405, 250985, 258055, 523483, 2617415, 3664381, 18321905]

約数ペア:

[(1, 18321905), (5, 3664381), (7, 2617415), (35, 523483), (71, 258055), (73, 250985), (101, 181405), (355, 51611), (365, 50197), (497, 36865), (505, 36281), (511, 35855), (707, 25915), (2485, 7373), (2555, 7171), (3535, 5183)]