18991055

素因数分解:

$5^1\times {\mathrm{47}}^1\times {\mathrm{211}}^1\times {\mathrm{383}}^1$

素因数の和:646

約数の個数: 16

約数和(自身を含む): 23445504

約数和(自身を除く): 4454449

約数列:

[1, 5, 47, 211, 235, 383, 1055, 1915, 9917, 18001, 49585, 80813, 90005, 404065, 3798211, 18991055]

約数ペア:

[(1, 18991055), (5, 3798211), (47, 404065), (211, 90005), (235, 80813), (383, 49585), (1055, 18001), (1915, 9917)]