21389811

素因数分解:

$3^1\times {\mathrm{37}}^1\times {\mathrm{131}}^1\times {\mathrm{1471}}^1$

素因数の和:1642

約数の個数: 16

約数和(自身を含む): 29534208

約数和(自身を除く): 8144397

約数列:

[1, 3, 37, 111, 131, 393, 1471, 4413, 4847, 14541, 54427, 163281, 192701, 578103, 7129937, 21389811]

約数ペア:

[(1, 21389811), (3, 7129937), (37, 578103), (111, 192701), (131, 163281), (393, 54427), (1471, 14541), (4413, 4847)]