20972445

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{821}}^1$

素因数の和:973

約数の個数: 32

約数和(自身を含む): 36457344

約数和(自身を除く): 15484899

約数列:

[1, 3, 5, 13, 15, 39, 65, 131, 195, 393, 655, 821, 1703, 1965, 2463, 4105, 5109, 8515, 10673, 12315, 25545, 32019, 53365, 107551, 160095, 322653, 537755, 1398163, 1613265, 4194489, 6990815, 20972445]

約数ペア:

[(1, 20972445), (3, 6990815), (5, 4194489), (13, 1613265), (15, 1398163), (39, 537755), (65, 322653), (131, 160095), (195, 107551), (393, 53365), (655, 32019), (821, 25545), (1703, 12315), (1965, 10673), (2463, 8515), (4105, 5109)]