20389365

素因数分解:

$3^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{83}}^1\times {\mathrm{103}}^1$

素因数の和:250

約数の個数: 48

約数和(自身を含む): 36796032

約数和(自身を除く): 16406667

約数列:

[1, 3, 5, 9, 15, 45, 53, 83, 103, 159, 249, 265, 309, 415, 477, 515, 747, 795, 927, 1245, 1545, 2385, 3735, 4399, 4635, 5459, 8549, 13197, 16377, 21995, 25647, 27295, 39591, 42745, 49131, 65985, 76941, 81885, 128235, 197955, 245655, 384705, 453097, 1359291, 2265485, 4077873, 6796455, 20389365]

約数ペア:

[(1, 20389365), (3, 6796455), (5, 4077873), (9, 2265485), (15, 1359291), (45, 453097), (53, 384705), (83, 245655), (103, 197955), (159, 128235), (249, 81885), (265, 76941), (309, 65985), (415, 49131), (477, 42745), (515, 39591), (747, 27295), (795, 25647), (927, 21995), (1245, 16377), (1545, 13197), (2385, 8549), (3735, 5459), (4399, 4635)]