20508760

素因数分解:

$2^3\times 5^1\times {\mathrm{331}}^1\times {\mathrm{1549}}^1$

素因数の和:1891

約数の個数: 32

約数和(自身を含む): 46314000

約数和(自身を除く): 25805240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 331, 662, 1324, 1549, 1655, 2648, 3098, 3310, 6196, 6620, 7745, 12392, 13240, 15490, 30980, 61960, 512719, 1025438, 2050876, 2563595, 4101752, 5127190, 10254380, 20508760]

約数ペア:

[(1, 20508760), (2, 10254380), (4, 5127190), (5, 4101752), (8, 2563595), (10, 2050876), (20, 1025438), (40, 512719), (331, 61960), (662, 30980), (1324, 15490), (1549, 13240), (1655, 12392), (2648, 7745), (3098, 6620), (3310, 6196)]