20854340

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{80209}}^1$

素因数の和:80231

約数の個数: 24

約数和(自身を含む): 47163480

約数和(自身を除く): 26309140

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 80209, 160418, 320836, 401045, 802090, 1042717, 1604180, 2085434, 4170868, 5213585, 10427170, 20854340]

約数ペア:

[(1, 20854340), (2, 10427170), (4, 5213585), (5, 4170868), (10, 2085434), (13, 1604180), (20, 1042717), (26, 802090), (52, 401045), (65, 320836), (130, 160418), (260, 80209)]