19840725

素因数分解:

$3^2\times 5^2\times {\mathrm{109}}^1\times {\mathrm{809}}^1$

素因数の和:934

約数の個数: 36

約数和(自身を含む): 35907300

約数和(自身を除く): 16066575

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 109, 225, 327, 545, 809, 981, 1635, 2427, 2725, 4045, 4905, 7281, 8175, 12135, 20225, 24525, 36405, 60675, 88181, 182025, 264543, 440905, 793629, 1322715, 2204525, 3968145, 6613575, 19840725]

約数ペア:

[(1, 19840725), (3, 6613575), (5, 3968145), (9, 2204525), (15, 1322715), (25, 793629), (45, 440905), (75, 264543), (109, 182025), (225, 88181), (327, 60675), (545, 36405), (809, 24525), (981, 20225), (1635, 12135), (2427, 8175), (2725, 7281), (4045, 4905)]