20809761

素因数分解:

$3^1\times 7^2\times {\mathrm{53}}^1\times {\mathrm{2671}}^1$

素因数の和:2741

約数の個数: 24

約数和(自身を含む): 32897664

約数和(自身を除く): 12087903

約数列:

[1, 3, 7, 21, 49, 53, 147, 159, 371, 1113, 2597, 2671, 7791, 8013, 18697, 56091, 130879, 141563, 392637, 424689, 990941, 2972823, 6936587, 20809761]

約数ペア:

[(1, 20809761), (3, 6936587), (7, 2972823), (21, 990941), (49, 424689), (53, 392637), (147, 141563), (159, 130879), (371, 56091), (1113, 18697), (2597, 8013), (2671, 7791)]