21369140

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{82189}}^1$

素因数の和:82211

約数の個数: 24

約数和(自身を含む): 48327720

約数和(自身を除く): 26958580

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 82189, 164378, 328756, 410945, 821890, 1068457, 1643780, 2136914, 4273828, 5342285, 10684570, 21369140]

約数ペア:

[(1, 21369140), (2, 10684570), (4, 5342285), (5, 4273828), (10, 2136914), (13, 1643780), (20, 1068457), (26, 821890), (52, 410945), (65, 328756), (130, 164378), (260, 82189)]