21286535

素因数分解:

$5^1\times {\mathrm{47}}^1\times {\mathrm{239}}^1\times {\mathrm{379}}^1$

素因数の和:670

約数の個数: 16

約数和(自身を含む): 26265600

約数和(自身を除く): 4979065

約数列:

[1, 5, 47, 235, 239, 379, 1195, 1895, 11233, 17813, 56165, 89065, 90581, 452905, 4257307, 21286535]

約数ペア:

[(1, 21286535), (5, 4257307), (47, 452905), (235, 90581), (239, 89065), (379, 56165), (1195, 17813), (1895, 11233)]