20509251

素因数分解:

$3^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{18427}}^1$

素因数の和:18490

約数の個数: 16

約数和(自身を含む): 31843584

約数和(自身を除く): 11334333

約数列:

[1, 3, 7, 21, 53, 159, 371, 1113, 18427, 55281, 128989, 386967, 976631, 2929893, 6836417, 20509251]

約数ペア:

[(1, 20509251), (3, 6836417), (7, 2929893), (21, 976631), (53, 386967), (159, 128989), (371, 55281), (1113, 18427)]