21245469

素因数分解:

$3^1\times 7^2\times {\mathrm{113}}^1\times {\mathrm{1279}}^1$

素因数の和:1409

約数の個数: 24

約数和(自身を含む): 33269760

約数和(自身を除く): 12024291

約数列:

[1, 3, 7, 21, 49, 113, 147, 339, 791, 1279, 2373, 3837, 5537, 8953, 16611, 26859, 62671, 144527, 188013, 433581, 1011689, 3035067, 7081823, 21245469]

約数ペア:

[(1, 21245469), (3, 7081823), (7, 3035067), (21, 1011689), (49, 433581), (113, 188013), (147, 144527), (339, 62671), (791, 26859), (1279, 16611), (2373, 8953), (3837, 5537)]