661560772

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{409}}^1\times {\mathrm{21283}}^1$

素因数の和:21715

約数の個数: 24

約数和(自身を含む): 1221701600

約数和(自身を除く): 560140828

約数列:

[1, 2, 4, 19, 38, 76, 409, 818, 1636, 7771, 15542, 21283, 31084, 42566, 85132, 404377, 808754, 1617508, 8704747, 17409494, 34818988, 165390193, 330780386, 661560772]

約数ペア:

[(1, 661560772), (2, 330780386), (4, 165390193), (19, 34818988), (38, 17409494), (76, 8704747), (409, 1617508), (818, 808754), (1636, 404377), (7771, 85132), (15542, 42566), (21283, 31084)]