18821920

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{9049}}^1$

素因数の和:9077

約数の個数: 48

約数和(自身を含む): 47892600

約数和(自身を除く): 29070680

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 104, 130, 160, 208, 260, 416, 520, 1040, 2080, 9049, 18098, 36196, 45245, 72392, 90490, 117637, 144784, 180980, 235274, 289568, 361960, 470548, 588185, 723920, 941096, 1176370, 1447840, 1882192, 2352740, 3764384, 4705480, 9410960, 18821920]

約数ペア:

[(1, 18821920), (2, 9410960), (4, 4705480), (5, 3764384), (8, 2352740), (10, 1882192), (13, 1447840), (16, 1176370), (20, 941096), (26, 723920), (32, 588185), (40, 470548), (52, 361960), (65, 289568), (80, 235274), (104, 180980), (130, 144784), (160, 117637), (208, 90490), (260, 72392), (416, 45245), (520, 36196), (1040, 18098), (2080, 9049)]