20811201920

素因数分解:

$2^7\times 5^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{10651}}^1$

素因数の和:10784

約数の個数: 128

約数和(自身を含む): 51630670080

約数和(自身を除く): 30819468160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 43, 64, 71, 80, 86, 128, 142, 160, 172, 215, 284, 320, 344, 355, 430, 568, 640, 688, 710, 860, 1136, 1376, 1420, 1720, 2272, 2752, 2840, 3053, 3440, 4544, 5504, 5680, 6106, 6880, 9088, 10651, 11360, 12212, 13760, 15265, 21302, 22720, 24424, 27520, 30530, 42604, 45440, 48848, 53255, 61060, 85208, 97696, 106510, 122120, 170416, 195392, 213020, 244240, 340832, 390784, 426040, 457993, 488480, 681664, 756221, 852080, 915986, 976960, 1363328, 1512442, 1704160, 1831972, 1953920, 2289965, 3024884, 3408320, 3663944, 3781105, 4579930, 6049768, 6816640, 7327888, 7562210, 9159860, 12099536, 14655776, 15124420, 18319720, 24199072, 29311552, 30248840, 32517503, 36639440, 48398144, 58623104, 60497680, 65035006, 73278880, 96796288, 120995360, 130070012, 146557760, 162587515, 241990720, 260140024, 293115520, 325175030, 483981440, 520280048, 650350060, 1040560096, 1300700120, 2081120192, 2601400240, 4162240384, 5202800480, 10405600960, 20811201920]

約数ペア:

[(1, 20811201920), (2, 10405600960), (4, 5202800480), (5, 4162240384), (8, 2601400240), (10, 2081120192), (16, 1300700120), (20, 1040560096), (32, 650350060), (40, 520280048), (43, 483981440), (64, 325175030), (71, 293115520), (80, 260140024), (86, 241990720), (128, 162587515), (142, 146557760), (160, 130070012), (172, 120995360), (215, 96796288), (284, 73278880), (320, 65035006), (344, 60497680), (355, 58623104), (430, 48398144), (568, 36639440), (640, 32517503), (688, 30248840), (710, 29311552), (860, 24199072), (1136, 18319720), (1376, 15124420), (1420, 14655776), (1720, 12099536), (2272, 9159860), (2752, 7562210), (2840, 7327888), (3053, 6816640), (3440, 6049768), (4544, 4579930), (5504, 3781105), (5680, 3663944), (6106, 3408320), (6880, 3024884), (9088, 2289965), (10651, 1953920), (11360, 1831972), (12212, 1704160), (13760, 1512442), (15265, 1363328), (21302, 976960), (22720, 915986), (24424, 852080), (27520, 756221), (30530, 681664), (42604, 488480), (45440, 457993), (48848, 426040), (53255, 390784), (61060, 340832), (85208, 244240), (97696, 213020), (106510, 195392), (122120, 170416)]