28697890

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{16981}}^1$

素因数の和:17014

約数の個数: 24

約数和(自身を含む): 55938708

約数和(自身を除く): 27240818

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 169, 338, 845, 1690, 16981, 33962, 84905, 169810, 220753, 441506, 1103765, 2207530, 2869789, 5739578, 14348945, 28697890]

約数ペア:

[(1, 28697890), (2, 14348945), (5, 5739578), (10, 2869789), (13, 2207530), (26, 1103765), (65, 441506), (130, 220753), (169, 169810), (338, 84905), (845, 33962), (1690, 16981)]