21348080

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^2\times {\mathrm{1579}}^1$

素因数の和:1618

約数の個数: 60

約数和(自身を含む): 53780040

約数和(自身を除く): 32431960

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 169, 208, 260, 338, 520, 676, 845, 1040, 1352, 1579, 1690, 2704, 3158, 3380, 6316, 6760, 7895, 12632, 13520, 15790, 20527, 25264, 31580, 41054, 63160, 82108, 102635, 126320, 164216, 205270, 266851, 328432, 410540, 533702, 821080, 1067404, 1334255, 1642160, 2134808, 2668510, 4269616, 5337020, 10674040, 21348080]

約数ペア:

[(1, 21348080), (2, 10674040), (4, 5337020), (5, 4269616), (8, 2668510), (10, 2134808), (13, 1642160), (16, 1334255), (20, 1067404), (26, 821080), (40, 533702), (52, 410540), (65, 328432), (80, 266851), (104, 205270), (130, 164216), (169, 126320), (208, 102635), (260, 82108), (338, 63160), (520, 41054), (676, 31580), (845, 25264), (1040, 20527), (1352, 15790), (1579, 13520), (1690, 12632), (2704, 7895), (3158, 6760), (3380, 6316)]