20123781340

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{1090129}}^1$

素因数の和:1090222

約数の個数: 48

約数和(自身を含む): 46151743680

約数和(自身を除く): 26027962340

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 71, 130, 142, 260, 284, 355, 710, 923, 1420, 1846, 3692, 4615, 9230, 18460, 1090129, 2180258, 4360516, 5450645, 10901290, 14171677, 21802580, 28343354, 56686708, 70858385, 77399159, 141716770, 154798318, 283433540, 309596636, 386995795, 773991590, 1006189067, 1547983180, 2012378134, 4024756268, 5030945335, 10061890670, 20123781340]

約数ペア:

[(1, 20123781340), (2, 10061890670), (4, 5030945335), (5, 4024756268), (10, 2012378134), (13, 1547983180), (20, 1006189067), (26, 773991590), (52, 386995795), (65, 309596636), (71, 283433540), (130, 154798318), (142, 141716770), (260, 77399159), (284, 70858385), (355, 56686708), (710, 28343354), (923, 21802580), (1420, 14171677), (1846, 10901290), (3692, 5450645), (4615, 4360516), (9230, 2180258), (18460, 1090129)]