20987798

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{577}}^1\times {\mathrm{1399}}^1$

素因数の和:1991

約数の個数: 16

約数和(自身を含む): 33986400

約数和(自身を除く): 12998602

約数列:

[1, 2, 13, 26, 577, 1154, 1399, 2798, 7501, 15002, 18187, 36374, 807223, 1614446, 10493899, 20987798]

約数ペア:

[(1, 20987798), (2, 10493899), (13, 1614446), (26, 807223), (577, 36374), (1154, 18187), (1399, 15002), (2798, 7501)]