21989275

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{11423}}^1$

素因数の和:11451

約数の個数: 24

約数和(自身を含む): 33997824

約数和(自身を除く): 12008549

約数列:

[1, 5, 7, 11, 25, 35, 55, 77, 175, 275, 385, 1925, 11423, 57115, 79961, 125653, 285575, 399805, 628265, 879571, 1999025, 3141325, 4397855, 21989275]

約数ペア:

[(1, 21989275), (5, 4397855), (7, 3141325), (11, 1999025), (25, 879571), (35, 628265), (55, 399805), (77, 285575), (175, 125653), (275, 79961), (385, 57115), (1925, 11423)]