21231965

素因数分解:

$5^1\times {\mathrm{61}}^1\times {\mathrm{67}}^1\times {\mathrm{1039}}^1$

素因数の和:1172

約数の個数: 16

約数和(自身を含む): 26307840

約数和(自身を除く): 5075875

約数列:

[1, 5, 61, 67, 305, 335, 1039, 4087, 5195, 20435, 63379, 69613, 316895, 348065, 4246393, 21231965]

約数ペア:

[(1, 21231965), (5, 4246393), (61, 348065), (67, 316895), (305, 69613), (335, 63379), (1039, 20435), (4087, 5195)]