21503475

素因数分解:

$3^4\times 5^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1$

素因数の和:107

約数の個数: 120

約数和(自身を含む): 47892768

約数和(自身を除く): 26389293

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 27, 35, 37, 41, 45, 63, 75, 81, 105, 111, 123, 135, 175, 185, 189, 205, 225, 259, 287, 315, 333, 369, 405, 525, 555, 567, 615, 675, 777, 861, 925, 945, 999, 1025, 1107, 1295, 1435, 1517, 1575, 1665, 1845, 2025, 2331, 2583, 2775, 2835, 2997, 3075, 3321, 3885, 4305, 4551, 4725, 4995, 5535, 6475, 6993, 7175, 7585, 7749, 8325, 9225, 10619, 11655, 12915, 13653, 14175, 14985, 16605, 19425, 20979, 21525, 22755, 23247, 24975, 27675, 31857, 34965, 37925, 38745, 40959, 53095, 58275, 64575, 68265, 74925, 83025, 95571, 104895, 113775, 116235, 122877, 159285, 174825, 193725, 204795, 265475, 286713, 341325, 477855, 524475, 581175, 614385, 796425, 860139, 1023975, 1433565, 2389275, 3071925, 4300695, 7167825, 21503475]

約数ペア:

[(1, 21503475), (3, 7167825), (5, 4300695), (7, 3071925), (9, 2389275), (15, 1433565), (21, 1023975), (25, 860139), (27, 796425), (35, 614385), (37, 581175), (41, 524475), (45, 477855), (63, 341325), (75, 286713), (81, 265475), (105, 204795), (111, 193725), (123, 174825), (135, 159285), (175, 122877), (185, 116235), (189, 113775), (205, 104895), (225, 95571), (259, 83025), (287, 74925), (315, 68265), (333, 64575), (369, 58275), (405, 53095), (525, 40959), (555, 38745), (567, 37925), (615, 34965), (675, 31857), (777, 27675), (861, 24975), (925, 23247), (945, 22755), (999, 21525), (1025, 20979), (1107, 19425), (1295, 16605), (1435, 14985), (1517, 14175), (1575, 13653), (1665, 12915), (1845, 11655), (2025, 10619), (2331, 9225), (2583, 8325), (2775, 7749), (2835, 7585), (2997, 7175), (3075, 6993), (3321, 6475), (3885, 5535), (4305, 4995), (4551, 4725)]