21908115

素因数分解:

$3^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{6857}}^1$

素因数の和:6939

約数の個数: 24

約数和(自身を含む): 38514528

約数和(自身を除く): 16606413

約数列:

[1, 3, 5, 9, 15, 45, 71, 213, 355, 639, 1065, 3195, 6857, 20571, 34285, 61713, 102855, 308565, 486847, 1460541, 2434235, 4381623, 7302705, 21908115]

約数ペア:

[(1, 21908115), (3, 7302705), (5, 4381623), (9, 2434235), (15, 1460541), (45, 486847), (71, 308565), (213, 102855), (355, 61713), (639, 34285), (1065, 20571), (3195, 6857)]