21296805

素因数分解:

$3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{19997}}^1$

素因数の和:20076

約数の個数: 16

約数和(自身を含む): 34556544

約数和(自身を除く): 13259739

約数列:

[1, 3, 5, 15, 71, 213, 355, 1065, 19997, 59991, 99985, 299955, 1419787, 4259361, 7098935, 21296805]

約数ペア:

[(1, 21296805), (3, 7098935), (5, 4259361), (15, 1419787), (71, 299955), (213, 99985), (355, 59991), (1065, 19997)]