21440380

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{82463}}^1$

素因数の和:82485

約数の個数: 24

約数和(自身を含む): 48488832

約数和(自身を除く): 27048452

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 82463, 164926, 329852, 412315, 824630, 1072019, 1649260, 2144038, 4288076, 5360095, 10720190, 21440380]

約数ペア:

[(1, 21440380), (2, 10720190), (4, 5360095), (5, 4288076), (10, 2144038), (13, 1649260), (20, 1072019), (26, 824630), (52, 412315), (65, 329852), (130, 164926), (260, 82463)]