20901503

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{197}}^1\times {\mathrm{659}}^1$

素因数の和:886

約数の個数: 16

約数和(自身を含む): 25090560

約数和(自身を除く): 4189057

約数列:

[1, 7, 23, 161, 197, 659, 1379, 4531, 4613, 15157, 31717, 106099, 129823, 908761, 2985929, 20901503]

約数ペア:

[(1, 20901503), (7, 2985929), (23, 908761), (161, 129823), (197, 106099), (659, 31717), (1379, 15157), (4531, 4613)]