21454405

素因数分解:

$5^1\times 7^2\times {\mathrm{67}}^1\times {\mathrm{1307}}^1$

素因数の和:1393

約数の個数: 24

約数和(自身を含む): 30418848

約数和(自身を除く): 8964443

約数列:

[1, 5, 7, 35, 49, 67, 245, 335, 469, 1307, 2345, 3283, 6535, 9149, 16415, 45745, 64043, 87569, 320215, 437845, 612983, 3064915, 4290881, 21454405]

約数ペア:

[(1, 21454405), (5, 4290881), (7, 3064915), (35, 612983), (49, 437845), (67, 320215), (245, 87569), (335, 64043), (469, 45745), (1307, 16415), (2345, 9149), (3283, 6535)]