20121505

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{151}}^1\times {\mathrm{919}}^1$

素因数の和:1104

約数の個数: 16

約数和(自身を含む): 25171200

約数和(自身を除く): 5049695

約数列:

[1, 5, 29, 145, 151, 755, 919, 4379, 4595, 21895, 26651, 133255, 138769, 693845, 4024301, 20121505]

約数ペア:

[(1, 20121505), (5, 4024301), (29, 693845), (145, 138769), (151, 133255), (755, 26651), (919, 21895), (4379, 4595)]