425360

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{409}}^1$

素因数の和:435

約数の個数: 40

約数和(自身を含む): 1067640

約数和(自身を除く): 642280

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 409, 520, 818, 1040, 1636, 2045, 3272, 4090, 5317, 6544, 8180, 10634, 16360, 21268, 26585, 32720, 42536, 53170, 85072, 106340, 212680, 425360]

約数ペア:

[(1, 425360), (2, 212680), (4, 106340), (5, 85072), (8, 53170), (10, 42536), (13, 32720), (16, 26585), (20, 21268), (26, 16360), (40, 10634), (52, 8180), (65, 6544), (80, 5317), (104, 4090), (130, 3272), (208, 2045), (260, 1636), (409, 1040), (520, 818)]