21451820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{82507}}^1$

素因数の和:82529

約数の個数: 24

約数和(自身を含む): 48514704

約数和(自身を除く): 27062884

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 82507, 165014, 330028, 412535, 825070, 1072591, 1650140, 2145182, 4290364, 5362955, 10725910, 21451820]

約数ペア:

[(1, 21451820), (2, 10725910), (4, 5362955), (5, 4290364), (10, 2145182), (13, 1650140), (20, 1072591), (26, 825070), (52, 412535), (65, 330028), (130, 165014), (260, 82507)]