21108780

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{1523}}^1$

素因数の和:1556

約数の個数: 144

約数和(自身を含む): 79881984

約数和(自身を除く): 58773204

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 11, 12, 14, 15, 18, 20, 21, 22, 28, 30, 33, 35, 36, 42, 44, 45, 55, 60, 63, 66, 70, 77, 84, 90, 99, 105, 110, 126, 132, 140, 154, 165, 180, 198, 210, 220, 231, 252, 308, 315, 330, 385, 396, 420, 462, 495, 630, 660, 693, 770, 924, 990, 1155, 1260, 1386, 1523, 1540, 1980, 2310, 2772, 3046, 3465, 4569, 4620, 6092, 6930, 7615, 9138, 10661, 13707, 13860, 15230, 16753, 18276, 21322, 22845, 27414, 30460, 31983, 33506, 42644, 45690, 50259, 53305, 54828, 63966, 67012, 68535, 83765, 91380, 95949, 100518, 106610, 117271, 127932, 137070, 150777, 159915, 167530, 191898, 201036, 213220, 234542, 251295, 274140, 301554, 319830, 335060, 351813, 383796, 469084, 479745, 502590, 586355, 603108, 639660, 703626, 753885, 959490, 1005180, 1055439, 1172710, 1407252, 1507770, 1759065, 1918980, 2110878, 2345420, 3015540, 3518130, 4221756, 5277195, 7036260, 10554390, 21108780]

約数ペア:

[(1, 21108780), (2, 10554390), (3, 7036260), (4, 5277195), (5, 4221756), (6, 3518130), (7, 3015540), (9, 2345420), (10, 2110878), (11, 1918980), (12, 1759065), (14, 1507770), (15, 1407252), (18, 1172710), (20, 1055439), (21, 1005180), (22, 959490), (28, 753885), (30, 703626), (33, 639660), (35, 603108), (36, 586355), (42, 502590), (44, 479745), (45, 469084), (55, 383796), (60, 351813), (63, 335060), (66, 319830), (70, 301554), (77, 274140), (84, 251295), (90, 234542), (99, 213220), (105, 201036), (110, 191898), (126, 167530), (132, 159915), (140, 150777), (154, 137070), (165, 127932), (180, 117271), (198, 106610), (210, 100518), (220, 95949), (231, 91380), (252, 83765), (308, 68535), (315, 67012), (330, 63966), (385, 54828), (396, 53305), (420, 50259), (462, 45690), (495, 42644), (630, 33506), (660, 31983), (693, 30460), (770, 27414), (924, 22845), (990, 21322), (1155, 18276), (1260, 16753), (1386, 15230), (1523, 13860), (1540, 13707), (1980, 10661), (2310, 9138), (2772, 7615), (3046, 6930), (3465, 6092), (4569, 4620)]