20002005

素因数分解:

$3^3\times 5^1\times {\mathrm{229}}^1\times {\mathrm{647}}^1$

素因数の和:890

約数の個数: 32

約数和(自身を含む): 35769600

約数和(自身を除く): 15767595

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 229, 647, 687, 1145, 1941, 2061, 3235, 3435, 5823, 6183, 9705, 10305, 17469, 29115, 30915, 87345, 148163, 444489, 740815, 1333467, 2222445, 4000401, 6667335, 20002005]

約数ペア:

[(1, 20002005), (3, 6667335), (5, 4000401), (9, 2222445), (15, 1333467), (27, 740815), (45, 444489), (135, 148163), (229, 87345), (647, 30915), (687, 29115), (1145, 17469), (1941, 10305), (2061, 9705), (3235, 6183), (3435, 5823)]