20816925

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{563}}^1$

素因数の和:622

約数の個数: 48

約数和(自身を含む): 37765440

約数和(自身を除く): 16948515

約数列:

[1, 3, 5, 15, 17, 25, 29, 51, 75, 85, 87, 145, 255, 425, 435, 493, 563, 725, 1275, 1479, 1689, 2175, 2465, 2815, 7395, 8445, 9571, 12325, 14075, 16327, 28713, 36975, 42225, 47855, 48981, 81635, 143565, 239275, 244905, 277559, 408175, 717825, 832677, 1224525, 1387795, 4163385, 6938975, 20816925]

約数ペア:

[(1, 20816925), (3, 6938975), (5, 4163385), (15, 1387795), (17, 1224525), (25, 832677), (29, 717825), (51, 408175), (75, 277559), (85, 244905), (87, 239275), (145, 143565), (255, 81635), (425, 48981), (435, 47855), (493, 42225), (563, 36975), (725, 28713), (1275, 16327), (1479, 14075), (1689, 12325), (2175, 9571), (2465, 8445), (2815, 7395)]