20907663

素因数分解:

$3^1\times 7^2\times {\mathrm{41}}^1\times {\mathrm{3469}}^1$

素因数の和:3527

約数の個数: 24

約数和(自身を含む): 33228720

約数和(自身を除く): 12321057

約数列:

[1, 3, 7, 21, 41, 49, 123, 147, 287, 861, 2009, 3469, 6027, 10407, 24283, 72849, 142229, 169981, 426687, 509943, 995603, 2986809, 6969221, 20907663]

約数ペア:

[(1, 20907663), (3, 6969221), (7, 2986809), (21, 995603), (41, 509943), (49, 426687), (123, 169981), (147, 142229), (287, 72849), (861, 24283), (2009, 10407), (3469, 6027)]