21666765

素因数分解:

$3^1\times 5^1\times {\mathrm{47}}^1\times {\mathrm{73}}^1\times {\mathrm{421}}^1$

素因数の和:549

約数の個数: 32

約数和(自身を含む): 35974656

約数和(自身を除く): 14307891

約数列:

[1, 3, 5, 15, 47, 73, 141, 219, 235, 365, 421, 705, 1095, 1263, 2105, 3431, 6315, 10293, 17155, 19787, 30733, 51465, 59361, 92199, 98935, 153665, 296805, 460995, 1444451, 4333353, 7222255, 21666765]

約数ペア:

[(1, 21666765), (3, 7222255), (5, 4333353), (15, 1444451), (47, 460995), (73, 296805), (141, 153665), (219, 98935), (235, 92199), (365, 59361), (421, 51465), (705, 30733), (1095, 19787), (1263, 17155), (2105, 10293), (3431, 6315)]