21172790

素因数分解:

$2^1\times 5^1\times {\mathrm{79}}^1\times {\mathrm{26801}}^1$

素因数の和:26887

約数の個数: 16

約数和(自身を含む): 38594880

約数和(自身を除く): 17422090

約数列:

[1, 2, 5, 10, 79, 158, 395, 790, 26801, 53602, 134005, 268010, 2117279, 4234558, 10586395, 21172790]

約数ペア:

[(1, 21172790), (2, 10586395), (5, 4234558), (10, 2117279), (79, 268010), (158, 134005), (395, 53602), (790, 26801)]