21498975

素因数分解:

$3^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{107}}^1$

素因数の和:189

約数の個数: 72

約数和(自身を含む): 41783040

約数和(自身を除く): 20284065

約数列:

[1, 3, 5, 9, 15, 19, 25, 45, 47, 57, 75, 95, 107, 141, 171, 225, 235, 285, 321, 423, 475, 535, 705, 855, 893, 963, 1175, 1425, 1605, 2033, 2115, 2675, 2679, 3525, 4275, 4465, 4815, 5029, 6099, 8025, 8037, 10165, 10575, 13395, 15087, 18297, 22325, 24075, 25145, 30495, 40185, 45261, 50825, 66975, 75435, 91485, 95551, 125725, 152475, 200925, 226305, 286653, 377175, 457425, 477755, 859959, 1131525, 1433265, 2388775, 4299795, 7166325, 21498975]

約数ペア:

[(1, 21498975), (3, 7166325), (5, 4299795), (9, 2388775), (15, 1433265), (19, 1131525), (25, 859959), (45, 477755), (47, 457425), (57, 377175), (75, 286653), (95, 226305), (107, 200925), (141, 152475), (171, 125725), (225, 95551), (235, 91485), (285, 75435), (321, 66975), (423, 50825), (475, 45261), (535, 40185), (705, 30495), (855, 25145), (893, 24075), (963, 22325), (1175, 18297), (1425, 15087), (1605, 13395), (2033, 10575), (2115, 10165), (2675, 8037), (2679, 8025), (3525, 6099), (4275, 5029), (4465, 4815)]