212680

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{409}}^1$

素因数の和:433

約数の個数: 32

約数和(自身を含む): 516600

約数和(自身を除く): 303920

約数列:

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

約数ペア:

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