20841340

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{1129}}^1$

素因数の和:1222

約数の個数: 48

約数和(自身を含む): 47839680

約数和(自身を除く): 26998340

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 71, 130, 142, 260, 284, 355, 710, 923, 1129, 1420, 1846, 2258, 3692, 4516, 4615, 5645, 9230, 11290, 14677, 18460, 22580, 29354, 58708, 73385, 80159, 146770, 160318, 293540, 320636, 400795, 801590, 1042067, 1603180, 2084134, 4168268, 5210335, 10420670, 20841340]

約数ペア:

[(1, 20841340), (2, 10420670), (4, 5210335), (5, 4168268), (10, 2084134), (13, 1603180), (20, 1042067), (26, 801590), (52, 400795), (65, 320636), (71, 293540), (130, 160318), (142, 146770), (260, 80159), (284, 73385), (355, 58708), (710, 29354), (923, 22580), (1129, 18460), (1420, 14677), (1846, 11290), (2258, 9230), (3692, 5645), (4516, 4615)]