21450275

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^2\times {\mathrm{1013}}^1$

素因数の和:1052

約数の個数: 36

約数和(自身を含む): 33445776

約数和(自身を除く): 11995501

約数列:

[1, 5, 7, 11, 25, 35, 55, 77, 121, 175, 275, 385, 605, 847, 1013, 1925, 3025, 4235, 5065, 7091, 11143, 21175, 25325, 35455, 55715, 78001, 122573, 177275, 278575, 390005, 612865, 858011, 1950025, 3064325, 4290055, 21450275]

約数ペア:

[(1, 21450275), (5, 4290055), (7, 3064325), (11, 1950025), (25, 858011), (35, 612865), (55, 390005), (77, 278575), (121, 177275), (175, 122573), (275, 78001), (385, 55715), (605, 35455), (847, 25325), (1013, 21175), (1925, 11143), (3025, 7091), (4235, 5065)]