2780830

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{21391}}^1$

素因数の和:21411

約数の個数: 16

約数和(自身を含む): 5390784

約数和(自身を除く): 2609954

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 21391, 42782, 106955, 213910, 278083, 556166, 1390415, 2780830]

約数ペア:

[(1, 2780830), (2, 1390415), (5, 556166), (10, 278083), (13, 213910), (26, 106955), (65, 42782), (130, 21391)]