20718045

素因数分解:

$3^3\times 5^1\times {\mathrm{43}}^2\times {\mathrm{83}}^1$

素因数の和:183

約数の個数: 48

約数和(自身を含む): 38162880

約数和(自身を除く): 17444835

約数列:

[1, 3, 5, 9, 15, 27, 43, 45, 83, 129, 135, 215, 249, 387, 415, 645, 747, 1161, 1245, 1849, 1935, 2241, 3569, 3735, 5547, 5805, 9245, 10707, 11205, 16641, 17845, 27735, 32121, 49923, 53535, 83205, 96363, 153467, 160605, 249615, 460401, 481815, 767335, 1381203, 2302005, 4143609, 6906015, 20718045]

約数ペア:

[(1, 20718045), (3, 6906015), (5, 4143609), (9, 2302005), (15, 1381203), (27, 767335), (43, 481815), (45, 460401), (83, 249615), (129, 160605), (135, 153467), (215, 96363), (249, 83205), (387, 53535), (415, 49923), (645, 32121), (747, 27735), (1161, 17845), (1245, 16641), (1849, 11205), (1935, 10707), (2241, 9245), (3569, 5805), (3735, 5547)]