20821390

素因数分解:

$2^1\times 5^1\times {\mathrm{151}}^1\times {\mathrm{13789}}^1$

素因数の和:13947

約数の個数: 16

約数和(自身を含む): 37729440

約数和(自身を除く): 16908050

約数列:

[1, 2, 5, 10, 151, 302, 755, 1510, 13789, 27578, 68945, 137890, 2082139, 4164278, 10410695, 20821390]

約数ペア:

[(1, 20821390), (2, 10410695), (5, 4164278), (10, 2082139), (151, 137890), (302, 68945), (755, 27578), (1510, 13789)]