21515013

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{373}}^1$

素因数の和:438

約数の個数: 48

約数和(自身を含む): 36756720

約数和(自身を除く): 15241707

約数列:

[1, 3, 9, 13, 17, 29, 39, 51, 87, 117, 153, 221, 261, 373, 377, 493, 663, 1119, 1131, 1479, 1989, 3357, 3393, 4437, 4849, 6341, 6409, 10817, 14547, 19023, 19227, 32451, 43641, 57069, 57681, 82433, 97353, 140621, 183889, 247299, 421863, 551667, 741897, 1265589, 1655001, 2390557, 7171671, 21515013]

約数ペア:

[(1, 21515013), (3, 7171671), (9, 2390557), (13, 1655001), (17, 1265589), (29, 741897), (39, 551667), (51, 421863), (87, 247299), (117, 183889), (153, 140621), (221, 97353), (261, 82433), (373, 57681), (377, 57069), (493, 43641), (663, 32451), (1119, 19227), (1131, 19023), (1479, 14547), (1989, 10817), (3357, 6409), (3393, 6341), (4437, 4849)]