20508724340

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{78879709}}^1$

素因数の和:78879731

約数の個数: 24

約数和(自身を含む): 46381269480

約数和(自身を除く): 25872545140

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 78879709, 157759418, 315518836, 394398545, 788797090, 1025436217, 1577594180, 2050872434, 4101744868, 5127181085, 10254362170, 20508724340]

約数ペア:

[(1, 20508724340), (2, 10254362170), (4, 5127181085), (5, 4101744868), (10, 2050872434), (13, 1577594180), (20, 1025436217), (26, 788797090), (52, 394398545), (65, 315518836), (130, 157759418), (260, 78879709)]