208520505

素因数分解:

$3^2\times 5^1\times {\mathrm{641}}^1\times {\mathrm{7229}}^1$

素因数の和:7881

約数の個数: 24

約数和(自身を含む): 362049480

約数和(自身を除く): 153528975

約数列:

[1, 3, 5, 9, 15, 45, 641, 1923, 3205, 5769, 7229, 9615, 21687, 28845, 36145, 65061, 108435, 325305, 4633789, 13901367, 23168945, 41704101, 69506835, 208520505]

約数ペア:

[(1, 208520505), (3, 69506835), (5, 41704101), (9, 23168945), (15, 13901367), (45, 4633789), (641, 325305), (1923, 108435), (3205, 65061), (5769, 36145), (7229, 28845), (9615, 21687)]