20290275

素因数分解:

$3^2\times 5^2\times {\mathrm{31}}^1\times {\mathrm{2909}}^1$

素因数の和:2956

約数の個数: 36

約数和(自身を含む): 37527360

約数和(自身を除く): 17237085

約数列:

[1, 3, 5, 9, 15, 25, 31, 45, 75, 93, 155, 225, 279, 465, 775, 1395, 2325, 2909, 6975, 8727, 14545, 26181, 43635, 72725, 90179, 130905, 218175, 270537, 450895, 654525, 811611, 1352685, 2254475, 4058055, 6763425, 20290275]

約数ペア:

[(1, 20290275), (3, 6763425), (5, 4058055), (9, 2254475), (15, 1352685), (25, 811611), (31, 654525), (45, 450895), (75, 270537), (93, 218175), (155, 130905), (225, 90179), (279, 72725), (465, 43635), (775, 26181), (1395, 14545), (2325, 8727), (2909, 6975)]