21331240

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1$

素因数の和:155

約数の個数: 128

約数和(自身を含む): 59097600

約数和(自身を除く): 37766360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 29, 35, 37, 40, 56, 58, 70, 71, 74, 116, 140, 142, 145, 148, 185, 203, 232, 259, 280, 284, 290, 296, 355, 370, 406, 497, 518, 568, 580, 710, 740, 812, 994, 1015, 1036, 1073, 1160, 1295, 1420, 1480, 1624, 1988, 2030, 2059, 2072, 2146, 2485, 2590, 2627, 2840, 3976, 4060, 4118, 4292, 4970, 5180, 5254, 5365, 7511, 8120, 8236, 8584, 9940, 10295, 10360, 10508, 10730, 13135, 14413, 15022, 16472, 18389, 19880, 20590, 21016, 21460, 26270, 28826, 30044, 36778, 37555, 41180, 42920, 52540, 57652, 60088, 72065, 73556, 75110, 76183, 82360, 91945, 105080, 115304, 144130, 147112, 150220, 152366, 183890, 288260, 300440, 304732, 367780, 380915, 533281, 576520, 609464, 735560, 761830, 1066562, 1523660, 2133124, 2666405, 3047320, 4266248, 5332810, 10665620, 21331240]

約数ペア:

[(1, 21331240), (2, 10665620), (4, 5332810), (5, 4266248), (7, 3047320), (8, 2666405), (10, 2133124), (14, 1523660), (20, 1066562), (28, 761830), (29, 735560), (35, 609464), (37, 576520), (40, 533281), (56, 380915), (58, 367780), (70, 304732), (71, 300440), (74, 288260), (116, 183890), (140, 152366), (142, 150220), (145, 147112), (148, 144130), (185, 115304), (203, 105080), (232, 91945), (259, 82360), (280, 76183), (284, 75110), (290, 73556), (296, 72065), (355, 60088), (370, 57652), (406, 52540), (497, 42920), (518, 41180), (568, 37555), (580, 36778), (710, 30044), (740, 28826), (812, 26270), (994, 21460), (1015, 21016), (1036, 20590), (1073, 19880), (1160, 18389), (1295, 16472), (1420, 15022), (1480, 14413), (1624, 13135), (1988, 10730), (2030, 10508), (2059, 10360), (2072, 10295), (2146, 9940), (2485, 8584), (2590, 8236), (2627, 8120), (2840, 7511), (3976, 5365), (4060, 5254), (4118, 5180), (4292, 4970)]