20408015

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{4127}}^1$

素因数の和:4198

約数の個数: 16

約数和(自身を含む): 26155008

約数和(自身を除く): 5746993

約数列:

[1, 5, 23, 43, 115, 215, 989, 4127, 4945, 20635, 94921, 177461, 474605, 887305, 4081603, 20408015]

約数ペア:

[(1, 20408015), (5, 4081603), (23, 887305), (43, 474605), (115, 177461), (215, 94921), (989, 20635), (4127, 4945)]