20872131

素因数分解:

$3^1\times 7^1\times {\mathrm{223}}^1\times {\mathrm{4457}}^1$

素因数の和:4690

約数の個数: 16

約数和(自身を含む): 31954944

約数和(自身を除く): 11082813

約数列:

[1, 3, 7, 21, 223, 669, 1561, 4457, 4683, 13371, 31199, 93597, 993911, 2981733, 6957377, 20872131]

約数ペア:

[(1, 20872131), (3, 6957377), (7, 2981733), (21, 993911), (223, 93597), (669, 31199), (1561, 13371), (4457, 4683)]