20971190

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{1109}}^1$

素因数の和:1208

約数の個数: 32

約数和(自身を含む): 39640320

約数和(自身を除く): 18669130

約数列:

[1, 2, 5, 10, 31, 61, 62, 122, 155, 305, 310, 610, 1109, 1891, 2218, 3782, 5545, 9455, 11090, 18910, 34379, 67649, 68758, 135298, 171895, 338245, 343790, 676490, 2097119, 4194238, 10485595, 20971190]

約数ペア:

[(1, 20971190), (2, 10485595), (5, 4194238), (10, 2097119), (31, 676490), (61, 343790), (62, 338245), (122, 171895), (155, 135298), (305, 68758), (310, 67649), (610, 34379), (1109, 18910), (1891, 11090), (2218, 9455), (3782, 5545)]