21274790

素因数分解:

$2^1\times 5^1\times {\mathrm{641}}^1\times {\mathrm{3319}}^1$

素因数の和:3967

約数の個数: 16

約数和(自身を含む): 38365920

約数和(自身を除く): 17091130

約数列:

[1, 2, 5, 10, 641, 1282, 3205, 3319, 6410, 6638, 16595, 33190, 2127479, 4254958, 10637395, 21274790]

約数ペア:

[(1, 21274790), (2, 10637395), (5, 4254958), (10, 2127479), (641, 33190), (1282, 16595), (3205, 6638), (3319, 6410)]