19887400

素因数分解:

$2^3\times 5^2\times {\mathrm{13}}^1\times {\mathrm{7649}}^1$

素因数の和:7678

約数の個数: 48

約数和(自身を含む): 49801500

約数和(自身を除く): 29914100

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 25, 26, 40, 50, 52, 65, 100, 104, 130, 200, 260, 325, 520, 650, 1300, 2600, 7649, 15298, 30596, 38245, 61192, 76490, 99437, 152980, 191225, 198874, 305960, 382450, 397748, 497185, 764900, 795496, 994370, 1529800, 1988740, 2485925, 3977480, 4971850, 9943700, 19887400]

約数ペア:

[(1, 19887400), (2, 9943700), (4, 4971850), (5, 3977480), (8, 2485925), (10, 1988740), (13, 1529800), (20, 994370), (25, 795496), (26, 764900), (40, 497185), (50, 397748), (52, 382450), (65, 305960), (100, 198874), (104, 191225), (130, 152980), (200, 99437), (260, 76490), (325, 61192), (520, 38245), (650, 30596), (1300, 15298), (2600, 7649)]