20428416

素因数分解:

$2^7\times 3^3\times {\mathrm{23}}^1\times {\mathrm{257}}^1$

素因数の和:303

約数の個数: 128

約数和(自身を含む): 63158400

約数和(自身を除く): 42729984

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 23, 24, 27, 32, 36, 46, 48, 54, 64, 69, 72, 92, 96, 108, 128, 138, 144, 184, 192, 207, 216, 257, 276, 288, 368, 384, 414, 432, 514, 552, 576, 621, 736, 771, 828, 864, 1028, 1104, 1152, 1242, 1472, 1542, 1656, 1728, 2056, 2208, 2313, 2484, 2944, 3084, 3312, 3456, 4112, 4416, 4626, 4968, 5911, 6168, 6624, 6939, 8224, 8832, 9252, 9936, 11822, 12336, 13248, 13878, 16448, 17733, 18504, 19872, 23644, 24672, 26496, 27756, 32896, 35466, 37008, 39744, 47288, 49344, 53199, 55512, 70932, 74016, 79488, 94576, 98688, 106398, 111024, 141864, 148032, 159597, 189152, 212796, 222048, 283728, 296064, 319194, 378304, 425592, 444096, 567456, 638388, 756608, 851184, 888192, 1134912, 1276776, 1702368, 2269824, 2553552, 3404736, 5107104, 6809472, 10214208, 20428416]

約数ペア:

[(1, 20428416), (2, 10214208), (3, 6809472), (4, 5107104), (6, 3404736), (8, 2553552), (9, 2269824), (12, 1702368), (16, 1276776), (18, 1134912), (23, 888192), (24, 851184), (27, 756608), (32, 638388), (36, 567456), (46, 444096), (48, 425592), (54, 378304), (64, 319194), (69, 296064), (72, 283728), (92, 222048), (96, 212796), (108, 189152), (128, 159597), (138, 148032), (144, 141864), (184, 111024), (192, 106398), (207, 98688), (216, 94576), (257, 79488), (276, 74016), (288, 70932), (368, 55512), (384, 53199), (414, 49344), (432, 47288), (514, 39744), (552, 37008), (576, 35466), (621, 32896), (736, 27756), (771, 26496), (828, 24672), (864, 23644), (1028, 19872), (1104, 18504), (1152, 17733), (1242, 16448), (1472, 13878), (1542, 13248), (1656, 12336), (1728, 11822), (2056, 9936), (2208, 9252), (2313, 8832), (2484, 8224), (2944, 6939), (3084, 6624), (3312, 6168), (3456, 5911), (4112, 4968), (4416, 4626)]