18405920

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{8849}}^1$

素因数の和:8877

約数の個数: 48

約数和(自身を含む): 46834200

約数和(自身を除く): 28428280

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, 8849, 17698, 35396, 44245, 70792, 88490, 115037, 141584, 176980, 230074, 283168, 353960, 460148, 575185, 707920, 920296, 1150370, 1415840, 1840592, 2300740, 3681184, 4601480, 9202960, 18405920]

約数ペア:

[(1, 18405920), (2, 9202960), (4, 4601480), (5, 3681184), (8, 2300740), (10, 1840592), (13, 1415840), (16, 1150370), (20, 920296), (26, 707920), (32, 575185), (40, 460148), (52, 353960), (65, 283168), (80, 230074), (104, 176980), (130, 141584), (160, 115037), (208, 88490), (260, 70792), (416, 44245), (520, 35396), (1040, 17698), (2080, 8849)]