18986890

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{7687}}^1$

素因数の和:7726

約数の個数: 32

約数和(自身を含む): 38747520

約数和(自身を除く): 19760630

約数列:

[1, 2, 5, 10, 13, 19, 26, 38, 65, 95, 130, 190, 247, 494, 1235, 2470, 7687, 15374, 38435, 76870, 99931, 146053, 199862, 292106, 499655, 730265, 999310, 1460530, 1898689, 3797378, 9493445, 18986890]

約数ペア:

[(1, 18986890), (2, 9493445), (5, 3797378), (10, 1898689), (13, 1460530), (19, 999310), (26, 730265), (38, 499655), (65, 292106), (95, 199862), (130, 146053), (190, 99931), (247, 76870), (494, 38435), (1235, 15374), (2470, 7687)]