21175015

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{2039}}^1$

素因数の和:2142

約数の個数: 16

約数和(自身を含む): 26634240

約数和(自身を除く): 5459225

約数列:

[1, 5, 31, 67, 155, 335, 2039, 2077, 10195, 10385, 63209, 136613, 316045, 683065, 4235003, 21175015]

約数ペア:

[(1, 21175015), (5, 4235003), (31, 683065), (67, 316045), (155, 136613), (335, 63209), (2039, 10385), (2077, 10195)]