18912980

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{701}}^1$

素因数の和:800

約数の個数: 48

約数和(自身を含む): 42456960

約数和(自身を除く): 23543980

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 71, 76, 95, 142, 190, 284, 355, 380, 701, 710, 1349, 1402, 1420, 2698, 2804, 3505, 5396, 6745, 7010, 13319, 13490, 14020, 26638, 26980, 49771, 53276, 66595, 99542, 133190, 199084, 248855, 266380, 497710, 945649, 995420, 1891298, 3782596, 4728245, 9456490, 18912980]

約数ペア:

[(1, 18912980), (2, 9456490), (4, 4728245), (5, 3782596), (10, 1891298), (19, 995420), (20, 945649), (38, 497710), (71, 266380), (76, 248855), (95, 199084), (142, 133190), (190, 99542), (284, 66595), (355, 53276), (380, 49771), (701, 26980), (710, 26638), (1349, 14020), (1402, 13490), (1420, 13319), (2698, 7010), (2804, 6745), (3505, 5396)]