21908313

素因数分解:

$3^4\times 7^1\times {\mathrm{38639}}^1$

素因数の和:38658

約数の個数: 20

約数和(自身を含む): 37403520

約数和(自身を除く): 15495207

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 38639, 115917, 270473, 347751, 811419, 1043253, 2434257, 3129759, 7302771, 21908313]

約数ペア:

[(1, 21908313), (3, 7302771), (7, 3129759), (9, 2434257), (21, 1043253), (27, 811419), (63, 347751), (81, 270473), (189, 115917), (567, 38639)]