18387405

素因数分解:

$3^4\times 5^1\times {\mathrm{83}}^1\times {\mathrm{547}}^1$

素因数の和:647

約数の個数: 40

約数和(自身を含む): 33419232

約数和(自身を除く): 15031827

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 83, 135, 249, 405, 415, 547, 747, 1245, 1641, 2241, 2735, 3735, 4923, 6723, 8205, 11205, 14769, 24615, 33615, 44307, 45401, 73845, 136203, 221535, 227005, 408609, 681015, 1225827, 2043045, 3677481, 6129135, 18387405]

約数ペア:

[(1, 18387405), (3, 6129135), (5, 3677481), (9, 2043045), (15, 1225827), (27, 681015), (45, 408609), (81, 227005), (83, 221535), (135, 136203), (249, 73845), (405, 45401), (415, 44307), (547, 33615), (747, 24615), (1245, 14769), (1641, 11205), (2241, 8205), (2735, 6723), (3735, 4923)]