20831481

素因数分解:

$3^2\times {\mathrm{11}}^3\times {\mathrm{37}}^1\times {\mathrm{47}}^1$

素因数の和:123

約数の個数: 48

約数和(自身を含む): 34714368

約数和(自身を除く): 13882887

約数列:

[1, 3, 9, 11, 33, 37, 47, 99, 111, 121, 141, 333, 363, 407, 423, 517, 1089, 1221, 1331, 1551, 1739, 3663, 3993, 4477, 4653, 5217, 5687, 11979, 13431, 15651, 17061, 19129, 40293, 49247, 51183, 57387, 62557, 147741, 172161, 187671, 210419, 443223, 563013, 631257, 1893771, 2314609, 6943827, 20831481]

約数ペア:

[(1, 20831481), (3, 6943827), (9, 2314609), (11, 1893771), (33, 631257), (37, 563013), (47, 443223), (99, 210419), (111, 187671), (121, 172161), (141, 147741), (333, 62557), (363, 57387), (407, 51183), (423, 49247), (517, 40293), (1089, 19129), (1221, 17061), (1331, 15651), (1551, 13431), (1739, 11979), (3663, 5687), (3993, 5217), (4477, 4653)]