19987960

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{17231}}^1$

素因数の和:17271

約数の個数: 32

約数和(自身を含む): 46526400

約数和(自身を除く): 26538440

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 116, 145, 232, 290, 580, 1160, 17231, 34462, 68924, 86155, 137848, 172310, 344620, 499699, 689240, 999398, 1998796, 2498495, 3997592, 4996990, 9993980, 19987960]

約数ペア:

[(1, 19987960), (2, 9993980), (4, 4996990), (5, 3997592), (8, 2498495), (10, 1998796), (20, 999398), (29, 689240), (40, 499699), (58, 344620), (116, 172310), (145, 137848), (232, 86155), (290, 68924), (580, 34462), (1160, 17231)]