18397520

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{79}}^1$

素因数の和:204

約数の個数: 80

約数和(自身を含む): 44997120

約数和(自身を除く): 26599600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 71, 79, 80, 82, 142, 158, 164, 205, 284, 316, 328, 355, 395, 410, 568, 632, 656, 710, 790, 820, 1136, 1264, 1420, 1580, 1640, 2840, 2911, 3160, 3239, 3280, 5609, 5680, 5822, 6320, 6478, 11218, 11644, 12956, 14555, 16195, 22436, 23288, 25912, 28045, 29110, 32390, 44872, 46576, 51824, 56090, 58220, 64780, 89744, 112180, 116440, 129560, 224360, 229969, 232880, 259120, 448720, 459938, 919876, 1149845, 1839752, 2299690, 3679504, 4599380, 9198760, 18397520]

約数ペア:

[(1, 18397520), (2, 9198760), (4, 4599380), (5, 3679504), (8, 2299690), (10, 1839752), (16, 1149845), (20, 919876), (40, 459938), (41, 448720), (71, 259120), (79, 232880), (80, 229969), (82, 224360), (142, 129560), (158, 116440), (164, 112180), (205, 89744), (284, 64780), (316, 58220), (328, 56090), (355, 51824), (395, 46576), (410, 44872), (568, 32390), (632, 29110), (656, 28045), (710, 25912), (790, 23288), (820, 22436), (1136, 16195), (1264, 14555), (1420, 12956), (1580, 11644), (1640, 11218), (2840, 6478), (2911, 6320), (3160, 5822), (3239, 5680), (3280, 5609)]