20970710

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{73}}^1\times {\mathrm{1249}}^1$

素因数の和:1352

約数の個数: 32

約数和(自身を含む): 39960000

約数和(自身を除く): 18989290

約数列:

[1, 2, 5, 10, 23, 46, 73, 115, 146, 230, 365, 730, 1249, 1679, 2498, 3358, 6245, 8395, 12490, 16790, 28727, 57454, 91177, 143635, 182354, 287270, 455885, 911770, 2097071, 4194142, 10485355, 20970710]

約数ペア:

[(1, 20970710), (2, 10485355), (5, 4194142), (10, 2097071), (23, 911770), (46, 455885), (73, 287270), (115, 182354), (146, 143635), (230, 91177), (365, 57454), (730, 28727), (1249, 16790), (1679, 12490), (2498, 8395), (3358, 6245)]