20426679

素因数分解:

$3^2\times 7^3\times {\mathrm{13}}^1\times {\mathrm{509}}^1$

素因数の和:549

約数の個数: 48

約数和(自身を含む): 37128000

約数和(自身を除く): 16701321

約数列:

[1, 3, 7, 9, 13, 21, 39, 49, 63, 91, 117, 147, 273, 343, 441, 509, 637, 819, 1029, 1527, 1911, 3087, 3563, 4459, 4581, 5733, 6617, 10689, 13377, 19851, 24941, 32067, 40131, 46319, 59553, 74823, 138957, 174587, 224469, 324233, 416871, 523761, 972699, 1571283, 2269631, 2918097, 6808893, 20426679]

約数ペア:

[(1, 20426679), (3, 6808893), (7, 2918097), (9, 2269631), (13, 1571283), (21, 972699), (39, 523761), (49, 416871), (63, 324233), (91, 224469), (117, 174587), (147, 138957), (273, 74823), (343, 59553), (441, 46319), (509, 40131), (637, 32067), (819, 24941), (1029, 19851), (1527, 13377), (1911, 10689), (3087, 6617), (3563, 5733), (4459, 4581)]