21214905

素因数分解:

$3^1\times 5^1\times {\mathrm{401}}^1\times {\mathrm{3527}}^1$

素因数の和:3936

約数の個数: 16

約数和(自身を含む): 34038144

約数和(自身を除く): 12823239

約数列:

[1, 3, 5, 15, 401, 1203, 2005, 3527, 6015, 10581, 17635, 52905, 1414327, 4242981, 7071635, 21214905]

約数ペア:

[(1, 21214905), (3, 7071635), (5, 4242981), (15, 1414327), (401, 52905), (1203, 17635), (2005, 10581), (3527, 6015)]