21791380

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{83813}}^1$

素因数の和:83835

約数の個数: 24

約数和(自身を含む): 49282632

約数和(自身を除く): 27491252

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 83813, 167626, 335252, 419065, 838130, 1089569, 1676260, 2179138, 4358276, 5447845, 10895690, 21791380]

約数ペア:

[(1, 21791380), (2, 10895690), (4, 5447845), (5, 4358276), (10, 2179138), (13, 1676260), (20, 1089569), (26, 838130), (52, 419065), (65, 335252), (130, 167626), (260, 83813)]