31353880

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{18229}}^1$

素因数の和:18283

約数の個数: 32

約数和(自身を含む): 72190800

約数和(自身を除く): 40836920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 18229, 36458, 72916, 91145, 145832, 182290, 364580, 729160, 783847, 1567694, 3135388, 3919235, 6270776, 7838470, 15676940, 31353880]

約数ペア:

[(1, 31353880), (2, 15676940), (4, 7838470), (5, 6270776), (8, 3919235), (10, 3135388), (20, 1567694), (40, 783847), (43, 729160), (86, 364580), (172, 182290), (215, 145832), (344, 91145), (430, 72916), (860, 36458), (1720, 18229)]