21988835

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{401}}^1\times {\mathrm{997}}^1$

素因数の和:1414

約数の個数: 16

約数和(自身を含む): 28886112

約数和(自身を除く): 6897277

約数列:

[1, 5, 11, 55, 401, 997, 2005, 4411, 4985, 10967, 22055, 54835, 399797, 1998985, 4397767, 21988835]

約数ペア:

[(1, 21988835), (5, 4397767), (11, 1998985), (55, 399797), (401, 54835), (997, 22055), (2005, 10967), (4411, 4985)]