21809520

素因数分解:

$2^4\times 3^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{439}}^1$

素因数の和:484

約数の個数: 160

約数和(自身を含む): 78566400

約数和(自身を除く): 56756880

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 23, 24, 27, 30, 36, 40, 45, 46, 48, 54, 60, 69, 72, 80, 90, 92, 108, 115, 120, 135, 138, 144, 180, 184, 207, 216, 230, 240, 270, 276, 345, 360, 368, 414, 432, 439, 460, 540, 552, 621, 690, 720, 828, 878, 920, 1035, 1080, 1104, 1242, 1317, 1380, 1656, 1756, 1840, 2070, 2160, 2195, 2484, 2634, 2760, 3105, 3312, 3512, 3951, 4140, 4390, 4968, 5268, 5520, 6210, 6585, 7024, 7902, 8280, 8780, 9936, 10097, 10536, 11853, 12420, 13170, 15804, 16560, 17560, 19755, 20194, 21072, 23706, 24840, 26340, 30291, 31608, 35120, 39510, 40388, 47412, 49680, 50485, 52680, 59265, 60582, 63216, 79020, 80776, 90873, 94824, 100970, 105360, 118530, 121164, 151455, 158040, 161552, 181746, 189648, 201940, 237060, 242328, 272619, 302910, 316080, 363492, 403880, 454365, 474120, 484656, 545238, 605820, 726984, 807760, 908730, 948240, 1090476, 1211640, 1363095, 1453968, 1817460, 2180952, 2423280, 2726190, 3634920, 4361904, 5452380, 7269840, 10904760, 21809520]

約数ペア:

[(1, 21809520), (2, 10904760), (3, 7269840), (4, 5452380), (5, 4361904), (6, 3634920), (8, 2726190), (9, 2423280), (10, 2180952), (12, 1817460), (15, 1453968), (16, 1363095), (18, 1211640), (20, 1090476), (23, 948240), (24, 908730), (27, 807760), (30, 726984), (36, 605820), (40, 545238), (45, 484656), (46, 474120), (48, 454365), (54, 403880), (60, 363492), (69, 316080), (72, 302910), (80, 272619), (90, 242328), (92, 237060), (108, 201940), (115, 189648), (120, 181746), (135, 161552), (138, 158040), (144, 151455), (180, 121164), (184, 118530), (207, 105360), (216, 100970), (230, 94824), (240, 90873), (270, 80776), (276, 79020), (345, 63216), (360, 60582), (368, 59265), (414, 52680), (432, 50485), (439, 49680), (460, 47412), (540, 40388), (552, 39510), (621, 35120), (690, 31608), (720, 30291), (828, 26340), (878, 24840), (920, 23706), (1035, 21072), (1080, 20194), (1104, 19755), (1242, 17560), (1317, 16560), (1380, 15804), (1656, 13170), (1756, 12420), (1840, 11853), (2070, 10536), (2160, 10097), (2195, 9936), (2484, 8780), (2634, 8280), (2760, 7902), (3105, 7024), (3312, 6585), (3512, 6210), (3951, 5520), (4140, 5268), (4390, 4968)]