20387925

素因数分解:

$3^2\times 5^2\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{79}}^1$

素因数の和:163

約数の個数: 72

約数和(自身を含む): 39203840

約数和(自身を除く): 18815915

約数列:

[1, 3, 5, 9, 15, 25, 31, 37, 45, 75, 79, 93, 111, 155, 185, 225, 237, 279, 333, 395, 465, 555, 711, 775, 925, 1147, 1185, 1395, 1665, 1975, 2325, 2449, 2775, 2923, 3441, 3555, 5735, 5925, 6975, 7347, 8325, 8769, 10323, 12245, 14615, 17205, 17775, 22041, 26307, 28675, 36735, 43845, 51615, 61225, 73075, 86025, 90613, 110205, 131535, 183675, 219225, 258075, 271839, 453065, 551025, 657675, 815517, 1359195, 2265325, 4077585, 6795975, 20387925]

約数ペア:

[(1, 20387925), (3, 6795975), (5, 4077585), (9, 2265325), (15, 1359195), (25, 815517), (31, 657675), (37, 551025), (45, 453065), (75, 271839), (79, 258075), (93, 219225), (111, 183675), (155, 131535), (185, 110205), (225, 90613), (237, 86025), (279, 73075), (333, 61225), (395, 51615), (465, 43845), (555, 36735), (711, 28675), (775, 26307), (925, 22041), (1147, 17775), (1185, 17205), (1395, 14615), (1665, 12245), (1975, 10323), (2325, 8769), (2449, 8325), (2775, 7347), (2923, 6975), (3441, 5925), (3555, 5735)]