28781870

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{221399}}^1$

素因数の和:221419

約数の個数: 16

約数和(自身を含む): 55792800

約数和(自身を除く): 27010930

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 221399, 442798, 1106995, 2213990, 2878187, 5756374, 14390935, 28781870]

約数ペア:

[(1, 28781870), (2, 14390935), (5, 5756374), (10, 2878187), (13, 2213990), (26, 1106995), (65, 442798), (130, 221399)]