21368728

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{2213}}^1$

素因数の和:2307

約数の個数: 32

約数和(自身を含む): 43040160

約数和(自身を除く): 21671432

約数列:

[1, 2, 4, 8, 17, 34, 68, 71, 136, 142, 284, 568, 1207, 2213, 2414, 4426, 4828, 8852, 9656, 17704, 37621, 75242, 150484, 157123, 300968, 314246, 628492, 1256984, 2671091, 5342182, 10684364, 21368728]

約数ペア:

[(1, 21368728), (2, 10684364), (4, 5342182), (8, 2671091), (17, 1256984), (34, 628492), (68, 314246), (71, 300968), (136, 157123), (142, 150484), (284, 75242), (568, 37621), (1207, 17704), (2213, 9656), (2414, 8852), (4426, 4828)]