21251740

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{151}}^1\times {\mathrm{227}}^1$

素因数の和:418

約数の個数: 48

約数和(自身を含む): 46577664

約数和(自身を除く): 25325924

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 151, 155, 227, 302, 310, 454, 604, 620, 755, 908, 1135, 1510, 2270, 3020, 4540, 4681, 7037, 9362, 14074, 18724, 23405, 28148, 34277, 35185, 46810, 68554, 70370, 93620, 137108, 140740, 171385, 342770, 685540, 1062587, 2125174, 4250348, 5312935, 10625870, 21251740]

約数ペア:

[(1, 21251740), (2, 10625870), (4, 5312935), (5, 4250348), (10, 2125174), (20, 1062587), (31, 685540), (62, 342770), (124, 171385), (151, 140740), (155, 137108), (227, 93620), (302, 70370), (310, 68554), (454, 46810), (604, 35185), (620, 34277), (755, 28148), (908, 23405), (1135, 18724), (1510, 14074), (2270, 9362), (3020, 7037), (4540, 4681)]