18528915

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{1249}}^1$

素因数の和:1323

約数の個数: 32

約数和(自身を含む): 31680000

約数和(自身を除く): 13151085

約数列:

[1, 3, 5, 15, 23, 43, 69, 115, 129, 215, 345, 645, 989, 1249, 2967, 3747, 4945, 6245, 14835, 18735, 28727, 53707, 86181, 143635, 161121, 268535, 430905, 805605, 1235261, 3705783, 6176305, 18528915]

約数ペア:

[(1, 18528915), (3, 6176305), (5, 3705783), (15, 1235261), (23, 805605), (43, 430905), (69, 268535), (115, 161121), (129, 143635), (215, 86181), (345, 53707), (645, 28727), (989, 18735), (1249, 14835), (2967, 6245), (3747, 4945)]