20700765

素因数分解:

$3^4\times 5^1\times {\mathrm{79}}^1\times {\mathrm{647}}^1$

素因数の和:743

約数の個数: 40

約数和(自身を含む): 37635840

約数和(自身を除く): 16935075

約数列:

[1, 3, 5, 9, 15, 27, 45, 79, 81, 135, 237, 395, 405, 647, 711, 1185, 1941, 2133, 3235, 3555, 5823, 6399, 9705, 10665, 17469, 29115, 31995, 51113, 52407, 87345, 153339, 255565, 262035, 460017, 766695, 1380051, 2300085, 4140153, 6900255, 20700765]

約数ペア:

[(1, 20700765), (3, 6900255), (5, 4140153), (9, 2300085), (15, 1380051), (27, 766695), (45, 460017), (79, 262035), (81, 255565), (135, 153339), (237, 87345), (395, 52407), (405, 51113), (647, 31995), (711, 29115), (1185, 17469), (1941, 10665), (2133, 9705), (3235, 6399), (3555, 5823)]