20381445

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{89}}^1\times {\mathrm{727}}^1$

素因数の和:834

約数の個数: 48

約数和(自身を含む): 40884480

約数和(自身を除く): 20503035

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 89, 105, 267, 315, 445, 623, 727, 801, 1335, 1869, 2181, 3115, 3635, 4005, 5089, 5607, 6543, 9345, 10905, 15267, 25445, 28035, 32715, 45801, 64703, 76335, 194109, 229005, 323515, 452921, 582327, 970545, 1358763, 2264605, 2911635, 4076289, 6793815, 20381445]

約数ペア:

[(1, 20381445), (3, 6793815), (5, 4076289), (7, 2911635), (9, 2264605), (15, 1358763), (21, 970545), (35, 582327), (45, 452921), (63, 323515), (89, 229005), (105, 194109), (267, 76335), (315, 64703), (445, 45801), (623, 32715), (727, 28035), (801, 25445), (1335, 15267), (1869, 10905), (2181, 9345), (3115, 6543), (3635, 5607), (4005, 5089)]