21538560

素因数分解:

$2^8\times 3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{79}}^1$

素因数の和:174

約数の個数: 144

約数和(自身を含む): 70640640

約数和(自身を除く): 49102080

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 48, 60, 64, 71, 79, 80, 96, 120, 128, 142, 158, 160, 192, 213, 237, 240, 256, 284, 316, 320, 355, 384, 395, 426, 474, 480, 568, 632, 640, 710, 768, 790, 852, 948, 960, 1065, 1136, 1185, 1264, 1280, 1420, 1580, 1704, 1896, 1920, 2130, 2272, 2370, 2528, 2840, 3160, 3408, 3792, 3840, 4260, 4544, 4740, 5056, 5609, 5680, 6320, 6816, 7584, 8520, 9088, 9480, 10112, 11218, 11360, 12640, 13632, 15168, 16827, 17040, 18176, 18960, 20224, 22436, 22720, 25280, 27264, 28045, 30336, 33654, 34080, 37920, 44872, 45440, 50560, 54528, 56090, 60672, 67308, 68160, 75840, 84135, 89744, 90880, 101120, 112180, 134616, 136320, 151680, 168270, 179488, 224360, 269232, 272640, 303360, 336540, 358976, 448720, 538464, 673080, 717952, 897440, 1076928, 1346160, 1435904, 1794880, 2153856, 2692320, 3589760, 4307712, 5384640, 7179520, 10769280, 21538560]

約数ペア:

[(1, 21538560), (2, 10769280), (3, 7179520), (4, 5384640), (5, 4307712), (6, 3589760), (8, 2692320), (10, 2153856), (12, 1794880), (15, 1435904), (16, 1346160), (20, 1076928), (24, 897440), (30, 717952), (32, 673080), (40, 538464), (48, 448720), (60, 358976), (64, 336540), (71, 303360), (79, 272640), (80, 269232), (96, 224360), (120, 179488), (128, 168270), (142, 151680), (158, 136320), (160, 134616), (192, 112180), (213, 101120), (237, 90880), (240, 89744), (256, 84135), (284, 75840), (316, 68160), (320, 67308), (355, 60672), (384, 56090), (395, 54528), (426, 50560), (474, 45440), (480, 44872), (568, 37920), (632, 34080), (640, 33654), (710, 30336), (768, 28045), (790, 27264), (852, 25280), (948, 22720), (960, 22436), (1065, 20224), (1136, 18960), (1185, 18176), (1264, 17040), (1280, 16827), (1420, 15168), (1580, 13632), (1704, 12640), (1896, 11360), (1920, 11218), (2130, 10112), (2272, 9480), (2370, 9088), (2528, 8520), (2840, 7584), (3160, 6816), (3408, 6320), (3792, 5680), (3840, 5609), (4260, 5056), (4544, 4740)]