21125475

素因数分解:

$3^3\times 5^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{263}}^1$

素因数の和:306

約数の個数: 96

約数和(自身を含む): 47139840

約数和(自身を除く): 26014365

約数列:

[1, 3, 5, 7, 9, 15, 17, 21, 25, 27, 35, 45, 51, 63, 75, 85, 105, 119, 135, 153, 175, 189, 225, 255, 263, 315, 357, 425, 459, 525, 595, 675, 765, 789, 945, 1071, 1275, 1315, 1575, 1785, 1841, 2295, 2367, 2975, 3213, 3825, 3945, 4471, 4725, 5355, 5523, 6575, 7101, 8925, 9205, 11475, 11835, 13413, 16065, 16569, 19725, 22355, 26775, 27615, 31297, 35505, 40239, 46025, 49707, 59175, 67065, 80325, 82845, 93891, 111775, 120717, 138075, 156485, 177525, 201195, 248535, 281673, 335325, 414225, 469455, 603585, 782425, 845019, 1005975, 1242675, 1408365, 2347275, 3017925, 4225095, 7041825, 21125475]

約数ペア:

[(1, 21125475), (3, 7041825), (5, 4225095), (7, 3017925), (9, 2347275), (15, 1408365), (17, 1242675), (21, 1005975), (25, 845019), (27, 782425), (35, 603585), (45, 469455), (51, 414225), (63, 335325), (75, 281673), (85, 248535), (105, 201195), (119, 177525), (135, 156485), (153, 138075), (175, 120717), (189, 111775), (225, 93891), (255, 82845), (263, 80325), (315, 67065), (357, 59175), (425, 49707), (459, 46025), (525, 40239), (595, 35505), (675, 31297), (765, 27615), (789, 26775), (945, 22355), (1071, 19725), (1275, 16569), (1315, 16065), (1575, 13413), (1785, 11835), (1841, 11475), (2295, 9205), (2367, 8925), (2975, 7101), (3213, 6575), (3825, 5523), (3945, 5355), (4471, 4725)]