81425620

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^2\times {\mathrm{47}}^1\times {\mathrm{103}}^1$

素因数の和:217

約数の個数: 72

約数和(自身を含む): 182617344

約数和(自身を除く): 101191724

約数列:

[1, 2, 4, 5, 10, 20, 29, 47, 58, 94, 103, 116, 145, 188, 206, 235, 290, 412, 470, 515, 580, 841, 940, 1030, 1363, 1682, 2060, 2726, 2987, 3364, 4205, 4841, 5452, 5974, 6815, 8410, 9682, 11948, 13630, 14935, 16820, 19364, 24205, 27260, 29870, 39527, 48410, 59740, 79054, 86623, 96820, 140389, 158108, 173246, 197635, 280778, 346492, 395270, 433115, 561556, 701945, 790540, 866230, 1403890, 1732460, 2807780, 4071281, 8142562, 16285124, 20356405, 40712810, 81425620]

約数ペア:

[(1, 81425620), (2, 40712810), (4, 20356405), (5, 16285124), (10, 8142562), (20, 4071281), (29, 2807780), (47, 1732460), (58, 1403890), (94, 866230), (103, 790540), (116, 701945), (145, 561556), (188, 433115), (206, 395270), (235, 346492), (290, 280778), (412, 197635), (470, 173246), (515, 158108), (580, 140389), (841, 96820), (940, 86623), (1030, 79054), (1363, 59740), (1682, 48410), (2060, 39527), (2726, 29870), (2987, 27260), (3364, 24205), (4205, 19364), (4841, 16820), (5452, 14935), (5974, 13630), (6815, 11948), (8410, 9682)]