20988880

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1$

素因数の和:125

約数の個数: 160

約数和(自身を含む): 59781888

約数和(自身を除く): 38793008

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 17, 20, 22, 23, 34, 40, 44, 46, 55, 61, 68, 80, 85, 88, 92, 110, 115, 122, 136, 170, 176, 184, 187, 220, 230, 244, 253, 272, 305, 340, 368, 374, 391, 440, 460, 488, 506, 610, 671, 680, 748, 782, 880, 920, 935, 976, 1012, 1037, 1220, 1265, 1342, 1360, 1403, 1496, 1564, 1840, 1870, 1955, 2024, 2074, 2440, 2530, 2684, 2806, 2992, 3128, 3355, 3740, 3910, 4048, 4148, 4301, 4880, 5060, 5185, 5368, 5612, 6256, 6710, 7015, 7480, 7820, 8296, 8602, 10120, 10370, 10736, 11224, 11407, 13420, 14030, 14960, 15433, 15640, 16592, 17204, 20240, 20740, 21505, 22448, 22814, 23851, 26840, 28060, 30866, 31280, 34408, 41480, 43010, 45628, 47702, 53680, 56120, 57035, 61732, 68816, 77165, 82960, 86020, 91256, 95404, 112240, 114070, 119255, 123464, 154330, 172040, 182512, 190808, 228140, 238510, 246928, 262361, 308660, 344080, 381616, 456280, 477020, 524722, 617320, 912560, 954040, 1049444, 1234640, 1311805, 1908080, 2098888, 2623610, 4197776, 5247220, 10494440, 20988880]

約数ペア:

[(1, 20988880), (2, 10494440), (4, 5247220), (5, 4197776), (8, 2623610), (10, 2098888), (11, 1908080), (16, 1311805), (17, 1234640), (20, 1049444), (22, 954040), (23, 912560), (34, 617320), (40, 524722), (44, 477020), (46, 456280), (55, 381616), (61, 344080), (68, 308660), (80, 262361), (85, 246928), (88, 238510), (92, 228140), (110, 190808), (115, 182512), (122, 172040), (136, 154330), (170, 123464), (176, 119255), (184, 114070), (187, 112240), (220, 95404), (230, 91256), (244, 86020), (253, 82960), (272, 77165), (305, 68816), (340, 61732), (368, 57035), (374, 56120), (391, 53680), (440, 47702), (460, 45628), (488, 43010), (506, 41480), (610, 34408), (671, 31280), (680, 30866), (748, 28060), (782, 26840), (880, 23851), (920, 22814), (935, 22448), (976, 21505), (1012, 20740), (1037, 20240), (1220, 17204), (1265, 16592), (1342, 15640), (1360, 15433), (1403, 14960), (1496, 14030), (1564, 13420), (1840, 11407), (1870, 11224), (1955, 10736), (2024, 10370), (2074, 10120), (2440, 8602), (2530, 8296), (2684, 7820), (2806, 7480), (2992, 7015), (3128, 6710), (3355, 6256), (3740, 5612), (3910, 5368), (4048, 5185), (4148, 5060), (4301, 4880)]