20918880

素因数分解:

$2^5\times 3^2\times 5^1\times {\mathrm{73}}^1\times {\mathrm{199}}^1$

素因数の和:293

約数の個数: 144

約数和(自身を含む): 72727200

約数和(自身を除く): 51808320

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 32, 36, 40, 45, 48, 60, 72, 73, 80, 90, 96, 120, 144, 146, 160, 180, 199, 219, 240, 288, 292, 360, 365, 398, 438, 480, 584, 597, 657, 720, 730, 796, 876, 995, 1095, 1168, 1194, 1314, 1440, 1460, 1592, 1752, 1791, 1990, 2190, 2336, 2388, 2628, 2920, 2985, 3184, 3285, 3504, 3582, 3980, 4380, 4776, 5256, 5840, 5970, 6368, 6570, 7008, 7164, 7960, 8760, 8955, 9552, 10512, 11680, 11940, 13140, 14328, 14527, 15920, 17520, 17910, 19104, 21024, 23880, 26280, 28656, 29054, 31840, 35040, 35820, 43581, 47760, 52560, 57312, 58108, 71640, 72635, 87162, 95520, 105120, 116216, 130743, 143280, 145270, 174324, 217905, 232432, 261486, 286560, 290540, 348648, 435810, 464864, 522972, 581080, 653715, 697296, 871620, 1045944, 1162160, 1307430, 1394592, 1743240, 2091888, 2324320, 2614860, 3486480, 4183776, 5229720, 6972960, 10459440, 20918880]

約数ペア:

[(1, 20918880), (2, 10459440), (3, 6972960), (4, 5229720), (5, 4183776), (6, 3486480), (8, 2614860), (9, 2324320), (10, 2091888), (12, 1743240), (15, 1394592), (16, 1307430), (18, 1162160), (20, 1045944), (24, 871620), (30, 697296), (32, 653715), (36, 581080), (40, 522972), (45, 464864), (48, 435810), (60, 348648), (72, 290540), (73, 286560), (80, 261486), (90, 232432), (96, 217905), (120, 174324), (144, 145270), (146, 143280), (160, 130743), (180, 116216), (199, 105120), (219, 95520), (240, 87162), (288, 72635), (292, 71640), (360, 58108), (365, 57312), (398, 52560), (438, 47760), (480, 43581), (584, 35820), (597, 35040), (657, 31840), (720, 29054), (730, 28656), (796, 26280), (876, 23880), (995, 21024), (1095, 19104), (1168, 17910), (1194, 17520), (1314, 15920), (1440, 14527), (1460, 14328), (1592, 13140), (1752, 11940), (1791, 11680), (1990, 10512), (2190, 9552), (2336, 8955), (2388, 8760), (2628, 7960), (2920, 7164), (2985, 7008), (3184, 6570), (3285, 6368), (3504, 5970), (3582, 5840), (3980, 5256), (4380, 4776)]