21289528

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{204707}}^1$

素因数の和:204726

約数の個数: 16

約数和(自身を含む): 42988680

約数和(自身を除く): 21699152

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 204707, 409414, 818828, 1637656, 2661191, 5322382, 10644764, 21289528]

約数ペア:

[(1, 21289528), (2, 10644764), (4, 5322382), (8, 2661191), (13, 1637656), (26, 818828), (52, 409414), (104, 204707)]