978010767340

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{688739977}}^1$

素因数の和:688740057

約数の個数: 24

約数和(自身を含む): 2082749693472

約数和(自身を除く): 1104738926132

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 688739977, 1377479954, 2754959908, 3443699885, 6887399770, 13774799540, 48900538367, 97801076734, 195602153468, 244502691835, 489005383670, 978010767340]

約数ペア:

[(1, 978010767340), (2, 489005383670), (4, 244502691835), (5, 195602153468), (10, 97801076734), (20, 48900538367), (71, 13774799540), (142, 6887399770), (284, 3443699885), (355, 2754959908), (710, 1377479954), (1420, 688739977)]