18278481

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{239}}^1$

素因数の和:345

約数の個数: 32

約数和(自身を含む): 27578880

約数和(自身を除く): 9300399

約数列:

[1, 3, 13, 37, 39, 53, 111, 159, 239, 481, 689, 717, 1443, 1961, 2067, 3107, 5883, 8843, 9321, 12667, 25493, 26529, 38001, 76479, 114959, 164671, 344877, 468679, 494013, 1406037, 6092827, 18278481]

約数ペア:

[(1, 18278481), (3, 6092827), (13, 1406037), (37, 494013), (39, 468679), (53, 344877), (111, 164671), (159, 114959), (239, 76479), (481, 38001), (689, 26529), (717, 25493), (1443, 12667), (1961, 9321), (2067, 8843), (3107, 5883)]