81790720

素因数分解:

$2^8\times 5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{157}}^1$

素因数の和:226

約数の個数: 144

約数和(自身を含む): 220899168

約数和(自身を除く): 139108448

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 37, 40, 44, 55, 64, 74, 80, 88, 110, 128, 148, 157, 160, 176, 185, 220, 256, 296, 314, 320, 352, 370, 407, 440, 592, 628, 640, 704, 740, 785, 814, 880, 1184, 1256, 1280, 1408, 1480, 1570, 1628, 1727, 1760, 2035, 2368, 2512, 2816, 2960, 3140, 3256, 3454, 3520, 4070, 4736, 5024, 5809, 5920, 6280, 6512, 6908, 7040, 8140, 8635, 9472, 10048, 11618, 11840, 12560, 13024, 13816, 14080, 16280, 17270, 20096, 23236, 23680, 25120, 26048, 27632, 29045, 32560, 34540, 40192, 46472, 47360, 50240, 52096, 55264, 58090, 63899, 65120, 69080, 92944, 100480, 104192, 110528, 116180, 127798, 130240, 138160, 185888, 200960, 221056, 232360, 255596, 260480, 276320, 319495, 371776, 442112, 464720, 511192, 520960, 552640, 638990, 743552, 929440, 1022384, 1105280, 1277980, 1487104, 1858880, 2044768, 2210560, 2555960, 3717760, 4089536, 5111920, 7435520, 8179072, 10223840, 16358144, 20447680, 40895360, 81790720]

約数ペア:

[(1, 81790720), (2, 40895360), (4, 20447680), (5, 16358144), (8, 10223840), (10, 8179072), (11, 7435520), (16, 5111920), (20, 4089536), (22, 3717760), (32, 2555960), (37, 2210560), (40, 2044768), (44, 1858880), (55, 1487104), (64, 1277980), (74, 1105280), (80, 1022384), (88, 929440), (110, 743552), (128, 638990), (148, 552640), (157, 520960), (160, 511192), (176, 464720), (185, 442112), (220, 371776), (256, 319495), (296, 276320), (314, 260480), (320, 255596), (352, 232360), (370, 221056), (407, 200960), (440, 185888), (592, 138160), (628, 130240), (640, 127798), (704, 116180), (740, 110528), (785, 104192), (814, 100480), (880, 92944), (1184, 69080), (1256, 65120), (1280, 63899), (1408, 58090), (1480, 55264), (1570, 52096), (1628, 50240), (1727, 47360), (1760, 46472), (2035, 40192), (2368, 34540), (2512, 32560), (2816, 29045), (2960, 27632), (3140, 26048), (3256, 25120), (3454, 23680), (3520, 23236), (4070, 20096), (4736, 17270), (5024, 16280), (5809, 14080), (5920, 13816), (6280, 13024), (6512, 12560), (6908, 11840), (7040, 11618), (8140, 10048), (8635, 9472)]