21091680

素因数分解:

$2^5\times 3^2\times 5^1\times {\mathrm{97}}^1\times {\mathrm{151}}^1$

素因数の和:269

約数の個数: 144

約数和(自身を含む): 73198944

約数和(自身を除く): 52107264

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 32, 36, 40, 45, 48, 60, 72, 80, 90, 96, 97, 120, 144, 151, 160, 180, 194, 240, 288, 291, 302, 360, 388, 453, 480, 485, 582, 604, 720, 755, 776, 873, 906, 970, 1164, 1208, 1359, 1440, 1455, 1510, 1552, 1746, 1812, 1940, 2265, 2328, 2416, 2718, 2910, 3020, 3104, 3492, 3624, 3880, 4365, 4530, 4656, 4832, 5436, 5820, 6040, 6795, 6984, 7248, 7760, 8730, 9060, 9312, 10872, 11640, 12080, 13590, 13968, 14496, 14647, 15520, 17460, 18120, 21744, 23280, 24160, 27180, 27936, 29294, 34920, 36240, 43488, 43941, 46560, 54360, 58588, 69840, 72480, 73235, 87882, 108720, 117176, 131823, 139680, 146470, 175764, 217440, 219705, 234352, 263646, 292940, 351528, 439410, 468704, 527292, 585880, 659115, 703056, 878820, 1054584, 1171760, 1318230, 1406112, 1757640, 2109168, 2343520, 2636460, 3515280, 4218336, 5272920, 7030560, 10545840, 21091680]

約数ペア:

[(1, 21091680), (2, 10545840), (3, 7030560), (4, 5272920), (5, 4218336), (6, 3515280), (8, 2636460), (9, 2343520), (10, 2109168), (12, 1757640), (15, 1406112), (16, 1318230), (18, 1171760), (20, 1054584), (24, 878820), (30, 703056), (32, 659115), (36, 585880), (40, 527292), (45, 468704), (48, 439410), (60, 351528), (72, 292940), (80, 263646), (90, 234352), (96, 219705), (97, 217440), (120, 175764), (144, 146470), (151, 139680), (160, 131823), (180, 117176), (194, 108720), (240, 87882), (288, 73235), (291, 72480), (302, 69840), (360, 58588), (388, 54360), (453, 46560), (480, 43941), (485, 43488), (582, 36240), (604, 34920), (720, 29294), (755, 27936), (776, 27180), (873, 24160), (906, 23280), (970, 21744), (1164, 18120), (1208, 17460), (1359, 15520), (1440, 14647), (1455, 14496), (1510, 13968), (1552, 13590), (1746, 12080), (1812, 11640), (1940, 10872), (2265, 9312), (2328, 9060), (2416, 8730), (2718, 7760), (2910, 7248), (3020, 6984), (3104, 6795), (3492, 6040), (3624, 5820), (3880, 5436), (4365, 4832), (4530, 4656)]