20391987

素因数分解:

$3^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{12611}}^1$

素因数の和:12639

約数の個数: 24

約数和(自身を含む): 34506432

約数和(自身を除く): 14114445

約数列:

[1, 3, 7, 11, 21, 33, 49, 77, 147, 231, 539, 1617, 12611, 37833, 88277, 138721, 264831, 416163, 617939, 971047, 1853817, 2913141, 6797329, 20391987]

約数ペア:

[(1, 20391987), (3, 6797329), (7, 2913141), (11, 1853817), (21, 971047), (33, 617939), (49, 416163), (77, 264831), (147, 138721), (231, 88277), (539, 37833), (1617, 12611)]