21337940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{59}}^1\times {\mathrm{107}}^1$

素因数の和:201

約数の個数: 72

約数和(自身を含む): 49805280

約数和(自身を除く): 28467340

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 59, 65, 107, 118, 130, 169, 214, 236, 260, 295, 338, 428, 535, 590, 676, 767, 845, 1070, 1180, 1391, 1534, 1690, 2140, 2782, 3068, 3380, 3835, 5564, 6313, 6955, 7670, 9971, 12626, 13910, 15340, 18083, 19942, 25252, 27820, 31565, 36166, 39884, 49855, 63130, 72332, 82069, 90415, 99710, 126260, 164138, 180830, 199420, 328276, 361660, 410345, 820690, 1066897, 1641380, 2133794, 4267588, 5334485, 10668970, 21337940]

約数ペア:

[(1, 21337940), (2, 10668970), (4, 5334485), (5, 4267588), (10, 2133794), (13, 1641380), (20, 1066897), (26, 820690), (52, 410345), (59, 361660), (65, 328276), (107, 199420), (118, 180830), (130, 164138), (169, 126260), (214, 99710), (236, 90415), (260, 82069), (295, 72332), (338, 63130), (428, 49855), (535, 39884), (590, 36166), (676, 31565), (767, 27820), (845, 25252), (1070, 19942), (1180, 18083), (1391, 15340), (1534, 13910), (1690, 12626), (2140, 9971), (2782, 7670), (3068, 6955), (3380, 6313), (3835, 5564)]