21231959

素因数分解:

$7^1\times {\mathrm{53}}^1\times {\mathrm{151}}^1\times {\mathrm{379}}^1$

素因数の和:590

約数の個数: 16

約数和(自身を含む): 24952320

約数和(自身を除く): 3720361

約数列:

[1, 7, 53, 151, 371, 379, 1057, 2653, 8003, 20087, 56021, 57229, 140609, 400603, 3033137, 21231959]

約数ペア:

[(1, 21231959), (7, 3033137), (53, 400603), (151, 140609), (371, 57229), (379, 56021), (1057, 20087), (2653, 8003)]