21082971

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{2663}}^1$

素因数の和:2715

約数の個数: 32

約数和(自身を含む): 35804160

約数和(自身を除く): 14721189

約数列:

[1, 3, 7, 13, 21, 29, 39, 87, 91, 203, 273, 377, 609, 1131, 2639, 2663, 7917, 7989, 18641, 34619, 55923, 77227, 103857, 231681, 242333, 540589, 726999, 1003951, 1621767, 3011853, 7027657, 21082971]

約数ペア:

[(1, 21082971), (3, 7027657), (7, 3011853), (13, 1621767), (21, 1003951), (29, 726999), (39, 540589), (87, 242333), (91, 231681), (203, 103857), (273, 77227), (377, 55923), (609, 34619), (1131, 18641), (2639, 7989), (2663, 7917)]