31391390

素因数分解:

$2^1\times 5^1\times {\mathrm{151}}^1\times {\mathrm{20789}}^1$

素因数の和:20947

約数の個数: 16

約数和(自身を含む): 56881440

約数和(自身を除く): 25490050

約数列:

[1, 2, 5, 10, 151, 302, 755, 1510, 20789, 41578, 103945, 207890, 3139139, 6278278, 15695695, 31391390]

約数ペア:

[(1, 31391390), (2, 15695695), (5, 6278278), (10, 3139139), (151, 207890), (302, 103945), (755, 41578), (1510, 20789)]