21180240

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{1279}}^1$

素因数の和:1321

約数の個数: 120

約数和(自身を含む): 74280960

約数和(自身を除く): 53100720

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 23, 24, 30, 36, 40, 45, 46, 48, 60, 69, 72, 80, 90, 92, 115, 120, 138, 144, 180, 184, 207, 230, 240, 276, 345, 360, 368, 414, 460, 552, 690, 720, 828, 920, 1035, 1104, 1279, 1380, 1656, 1840, 2070, 2558, 2760, 3312, 3837, 4140, 5116, 5520, 6395, 7674, 8280, 10232, 11511, 12790, 15348, 16560, 19185, 20464, 23022, 25580, 29417, 30696, 38370, 46044, 51160, 57555, 58834, 61392, 76740, 88251, 92088, 102320, 115110, 117668, 147085, 153480, 176502, 184176, 230220, 235336, 264753, 294170, 306960, 353004, 441255, 460440, 470672, 529506, 588340, 706008, 882510, 920880, 1059012, 1176680, 1323765, 1412016, 1765020, 2118024, 2353360, 2647530, 3530040, 4236048, 5295060, 7060080, 10590120, 21180240]

約数ペア:

[(1, 21180240), (2, 10590120), (3, 7060080), (4, 5295060), (5, 4236048), (6, 3530040), (8, 2647530), (9, 2353360), (10, 2118024), (12, 1765020), (15, 1412016), (16, 1323765), (18, 1176680), (20, 1059012), (23, 920880), (24, 882510), (30, 706008), (36, 588340), (40, 529506), (45, 470672), (46, 460440), (48, 441255), (60, 353004), (69, 306960), (72, 294170), (80, 264753), (90, 235336), (92, 230220), (115, 184176), (120, 176502), (138, 153480), (144, 147085), (180, 117668), (184, 115110), (207, 102320), (230, 92088), (240, 88251), (276, 76740), (345, 61392), (360, 58834), (368, 57555), (414, 51160), (460, 46044), (552, 38370), (690, 30696), (720, 29417), (828, 25580), (920, 23022), (1035, 20464), (1104, 19185), (1279, 16560), (1380, 15348), (1656, 12790), (1840, 11511), (2070, 10232), (2558, 8280), (2760, 7674), (3312, 6395), (3837, 5520), (4140, 5116)]