28391740

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{109199}}^1$

素因数の和:109221

約数の個数: 24

約数和(自身を含む): 64209600

約数和(自身を除く): 35817860

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 109199, 218398, 436796, 545995, 1091990, 1419587, 2183980, 2839174, 5678348, 7097935, 14195870, 28391740]

約数ペア:

[(1, 28391740), (2, 14195870), (4, 7097935), (5, 5678348), (10, 2839174), (13, 2183980), (20, 1419587), (26, 1091990), (52, 545995), (65, 436796), (130, 218398), (260, 109199)]