20281820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{78007}}^1$

素因数の和:78029

約数の個数: 24

約数和(自身を含む): 45868704

約数和(自身を除く): 25586884

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 78007, 156014, 312028, 390035, 780070, 1014091, 1560140, 2028182, 4056364, 5070455, 10140910, 20281820]

約数ペア:

[(1, 20281820), (2, 10140910), (4, 5070455), (5, 4056364), (10, 2028182), (13, 1560140), (20, 1014091), (26, 780070), (52, 390035), (65, 312028), (130, 156014), (260, 78007)]