21928725

素因数分解:

$3^4\times 5^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1$

素因数の和:66

約数の個数: 180

約数和(自身を含む): 53879364

約数和(自身を除く): 31950639

約数列:

[1, 3, 5, 7, 9, 13, 15, 17, 21, 25, 27, 35, 39, 45, 49, 51, 63, 65, 75, 81, 85, 91, 105, 117, 119, 135, 147, 153, 175, 189, 195, 221, 225, 245, 255, 273, 315, 325, 351, 357, 405, 425, 441, 455, 459, 525, 567, 585, 595, 637, 663, 675, 735, 765, 819, 833, 945, 975, 1053, 1071, 1105, 1225, 1275, 1323, 1365, 1377, 1547, 1575, 1755, 1785, 1911, 1989, 2025, 2205, 2275, 2295, 2457, 2499, 2835, 2925, 2975, 3185, 3213, 3315, 3675, 3825, 3969, 4095, 4165, 4641, 4725, 5265, 5355, 5525, 5733, 5967, 6615, 6825, 6885, 7371, 7497, 7735, 8775, 8925, 9555, 9639, 9945, 10829, 11025, 11475, 12285, 12495, 13923, 14175, 15925, 16065, 16575, 17199, 17901, 19845, 20475, 20825, 22491, 23205, 26325, 26775, 28665, 29835, 32487, 33075, 34425, 36855, 37485, 38675, 41769, 47775, 48195, 49725, 51597, 54145, 61425, 62475, 67473, 69615, 80325, 85995, 89505, 97461, 99225, 112455, 116025, 125307, 143325, 149175, 162435, 184275, 187425, 208845, 240975, 257985, 270725, 292383, 337365, 348075, 429975, 447525, 487305, 562275, 626535, 812175, 877149, 1044225, 1289925, 1461915, 1686825, 2436525, 3132675, 4385745, 7309575, 21928725]

約数ペア:

[(1, 21928725), (3, 7309575), (5, 4385745), (7, 3132675), (9, 2436525), (13, 1686825), (15, 1461915), (17, 1289925), (21, 1044225), (25, 877149), (27, 812175), (35, 626535), (39, 562275), (45, 487305), (49, 447525), (51, 429975), (63, 348075), (65, 337365), (75, 292383), (81, 270725), (85, 257985), (91, 240975), (105, 208845), (117, 187425), (119, 184275), (135, 162435), (147, 149175), (153, 143325), (175, 125307), (189, 116025), (195, 112455), (221, 99225), (225, 97461), (245, 89505), (255, 85995), (273, 80325), (315, 69615), (325, 67473), (351, 62475), (357, 61425), (405, 54145), (425, 51597), (441, 49725), (455, 48195), (459, 47775), (525, 41769), (567, 38675), (585, 37485), (595, 36855), (637, 34425), (663, 33075), (675, 32487), (735, 29835), (765, 28665), (819, 26775), (833, 26325), (945, 23205), (975, 22491), (1053, 20825), (1071, 20475), (1105, 19845), (1225, 17901), (1275, 17199), (1323, 16575), (1365, 16065), (1377, 15925), (1547, 14175), (1575, 13923), (1755, 12495), (1785, 12285), (1911, 11475), (1989, 11025), (2025, 10829), (2205, 9945), (2275, 9639), (2295, 9555), (2457, 8925), (2499, 8775), (2835, 7735), (2925, 7497), (2975, 7371), (3185, 6885), (3213, 6825), (3315, 6615), (3675, 5967), (3825, 5733), (3969, 5525), (4095, 5355), (4165, 5265), (4641, 4725)]