21651820

素因数分解:

$2^2\times 5^1\times {\mathrm{59}}^2\times {\mathrm{311}}^1$

素因数の和:438

約数の個数: 36

約数和(自身を含む): 46401264

約数和(自身を除く): 24749444

約数列:

[1, 2, 4, 5, 10, 20, 59, 118, 236, 295, 311, 590, 622, 1180, 1244, 1555, 3110, 3481, 6220, 6962, 13924, 17405, 18349, 34810, 36698, 69620, 73396, 91745, 183490, 366980, 1082591, 2165182, 4330364, 5412955, 10825910, 21651820]

約数ペア:

[(1, 21651820), (2, 10825910), (4, 5412955), (5, 4330364), (10, 2165182), (20, 1082591), (59, 366980), (118, 183490), (236, 91745), (295, 73396), (311, 69620), (590, 36698), (622, 34810), (1180, 18349), (1244, 17405), (1555, 13924), (3110, 6962), (3481, 6220)]