19989957

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{509}}^1$

素因数の和:597

約数の個数: 32

約数和(自身を含む): 30844800

約数和(自身を除く): 10854843

約数列:

[1, 3, 13, 19, 39, 53, 57, 159, 247, 509, 689, 741, 1007, 1527, 2067, 3021, 6617, 9671, 13091, 19851, 26977, 29013, 39273, 80931, 125723, 350701, 377169, 512563, 1052103, 1537689, 6663319, 19989957]

約数ペア:

[(1, 19989957), (3, 6663319), (13, 1537689), (19, 1052103), (39, 512563), (53, 377169), (57, 350701), (159, 125723), (247, 80931), (509, 39273), (689, 29013), (741, 26977), (1007, 19851), (1527, 13091), (2067, 9671), (3021, 6617)]