20912405

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{4229}}^1$

素因数の和:4300

約数の個数: 16

約数和(自身を含む): 26801280

約数和(自身を除く): 5888875

約数列:

[1, 5, 23, 43, 115, 215, 989, 4229, 4945, 21145, 97267, 181847, 486335, 909235, 4182481, 20912405]

約数ペア:

[(1, 20912405), (5, 4182481), (23, 909235), (43, 486335), (115, 181847), (215, 97267), (989, 21145), (4229, 4945)]