21289345

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^3\times {\mathrm{457}}^1$

素因数の和:502

約数の個数: 32

約数和(自身を含む): 32184576

約数和(自身を除く): 10895231

約数列:

[1, 5, 7, 11, 35, 55, 77, 121, 385, 457, 605, 847, 1331, 2285, 3199, 4235, 5027, 6655, 9317, 15995, 25135, 35189, 46585, 55297, 175945, 276485, 387079, 608267, 1935395, 3041335, 4257869, 21289345]

約数ペア:

[(1, 21289345), (5, 4257869), (7, 3041335), (11, 1935395), (35, 608267), (55, 387079), (77, 276485), (121, 175945), (385, 55297), (457, 46585), (605, 35189), (847, 25135), (1331, 15995), (2285, 9317), (3199, 6655), (4235, 5027)]