21308175

素因数分解:

$3^2\times 5^2\times 7^1\times {\mathrm{83}}^1\times {\mathrm{163}}^1$

素因数の和:269

約数の個数: 72

約数和(自身を含む): 44413824

約数和(自身を除く): 23105649

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 35, 45, 63, 75, 83, 105, 163, 175, 225, 249, 315, 415, 489, 525, 581, 747, 815, 1141, 1245, 1467, 1575, 1743, 2075, 2445, 2905, 3423, 3735, 4075, 5229, 5705, 6225, 7335, 8715, 10269, 12225, 13529, 14525, 17115, 18675, 26145, 28525, 36675, 40587, 43575, 51345, 67645, 85575, 94703, 121761, 130725, 202935, 256725, 284109, 338225, 473515, 608805, 852327, 1014675, 1420545, 2367575, 3044025, 4261635, 7102725, 21308175]

約数ペア:

[(1, 21308175), (3, 7102725), (5, 4261635), (7, 3044025), (9, 2367575), (15, 1420545), (21, 1014675), (25, 852327), (35, 608805), (45, 473515), (63, 338225), (75, 284109), (83, 256725), (105, 202935), (163, 130725), (175, 121761), (225, 94703), (249, 85575), (315, 67645), (415, 51345), (489, 43575), (525, 40587), (581, 36675), (747, 28525), (815, 26145), (1141, 18675), (1245, 17115), (1467, 14525), (1575, 13529), (1743, 12225), (2075, 10269), (2445, 8715), (2905, 7335), (3423, 6225), (3735, 5705), (4075, 5229)]