20718705

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{5333}}^1$

素因数の和:5385

約数の個数: 32

約数和(自身を含む): 38916864

約数和(自身を除く): 18198159

約数列:

[1, 3, 5, 7, 15, 21, 35, 37, 105, 111, 185, 259, 555, 777, 1295, 3885, 5333, 15999, 26665, 37331, 79995, 111993, 186655, 197321, 559965, 591963, 986605, 1381247, 2959815, 4143741, 6906235, 20718705]

約数ペア:

[(1, 20718705), (3, 6906235), (5, 4143741), (7, 2959815), (15, 1381247), (21, 986605), (35, 591963), (37, 559965), (105, 197321), (111, 186655), (185, 111993), (259, 79995), (555, 37331), (777, 26665), (1295, 15999), (3885, 5333)]