28405780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{109253}}^1$

素因数の和:109275

約数の個数: 24

約数和(自身を含む): 64241352

約数和(自身を除く): 35835572

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 109253, 218506, 437012, 546265, 1092530, 1420289, 2185060, 2840578, 5681156, 7101445, 14202890, 28405780]

約数ペア:

[(1, 28405780), (2, 14202890), (4, 7101445), (5, 5681156), (10, 2840578), (13, 2185060), (20, 1420289), (26, 1092530), (52, 546265), (65, 437012), (130, 218506), (260, 109253)]