81159680

素因数分解:

$2^9\times 5^1\times 7^2\times {\mathrm{647}}^1$

素因数の和:684

約数の個数: 120

約数和(自身を含む): 226713168

約数和(自身を除く): 145553488

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 64, 70, 80, 98, 112, 128, 140, 160, 196, 224, 245, 256, 280, 320, 392, 448, 490, 512, 560, 640, 647, 784, 896, 980, 1120, 1280, 1294, 1568, 1792, 1960, 2240, 2560, 2588, 3136, 3235, 3584, 3920, 4480, 4529, 5176, 6272, 6470, 7840, 8960, 9058, 10352, 12544, 12940, 15680, 17920, 18116, 20704, 22645, 25088, 25880, 31360, 31703, 36232, 41408, 45290, 51760, 62720, 63406, 72464, 82816, 90580, 103520, 125440, 126812, 144928, 158515, 165632, 181160, 207040, 253624, 289856, 317030, 331264, 362320, 414080, 507248, 579712, 634060, 724640, 828160, 1014496, 1159424, 1268120, 1449280, 1656320, 2028992, 2318848, 2536240, 2898560, 4057984, 5072480, 5797120, 8115968, 10144960, 11594240, 16231936, 20289920, 40579840, 81159680]

約数ペア:

[(1, 81159680), (2, 40579840), (4, 20289920), (5, 16231936), (7, 11594240), (8, 10144960), (10, 8115968), (14, 5797120), (16, 5072480), (20, 4057984), (28, 2898560), (32, 2536240), (35, 2318848), (40, 2028992), (49, 1656320), (56, 1449280), (64, 1268120), (70, 1159424), (80, 1014496), (98, 828160), (112, 724640), (128, 634060), (140, 579712), (160, 507248), (196, 414080), (224, 362320), (245, 331264), (256, 317030), (280, 289856), (320, 253624), (392, 207040), (448, 181160), (490, 165632), (512, 158515), (560, 144928), (640, 126812), (647, 125440), (784, 103520), (896, 90580), (980, 82816), (1120, 72464), (1280, 63406), (1294, 62720), (1568, 51760), (1792, 45290), (1960, 41408), (2240, 36232), (2560, 31703), (2588, 31360), (3136, 25880), (3235, 25088), (3584, 22645), (3920, 20704), (4480, 18116), (4529, 17920), (5176, 15680), (6272, 12940), (6470, 12544), (7840, 10352), (8960, 9058)]