405340

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1559}}^1$

素因数の和:1581

約数の個数: 24

約数和(自身を含む): 917280

約数和(自身を除く): 511940

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 1559, 3118, 6236, 7795, 15590, 20267, 31180, 40534, 81068, 101335, 202670, 405340]

約数ペア:

[(1, 405340), (2, 202670), (4, 101335), (5, 81068), (10, 40534), (13, 31180), (20, 20267), (26, 15590), (52, 7795), (65, 6236), (130, 3118), (260, 1559)]