81347840

素因数分解:

$2^8\times 5^1\times 7^2\times {\mathrm{1297}}^1$

素因数の和:1332

約数の個数: 108

約数和(自身を含む): 226841076

約数和(自身を除く): 145493236

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, 560, 640, 784, 896, 980, 1120, 1280, 1297, 1568, 1792, 1960, 2240, 2594, 3136, 3920, 4480, 5188, 6272, 6485, 7840, 8960, 9079, 10376, 12544, 12970, 15680, 18158, 20752, 25940, 31360, 36316, 41504, 45395, 51880, 62720, 63553, 72632, 83008, 90790, 103760, 127106, 145264, 166016, 181580, 207520, 254212, 290528, 317765, 332032, 363160, 415040, 508424, 581056, 635530, 726320, 830080, 1016848, 1162112, 1271060, 1452640, 1660160, 2033696, 2324224, 2542120, 2905280, 4067392, 5084240, 5810560, 8134784, 10168480, 11621120, 16269568, 20336960, 40673920, 81347840]

約数ペア:

[(1, 81347840), (2, 40673920), (4, 20336960), (5, 16269568), (7, 11621120), (8, 10168480), (10, 8134784), (14, 5810560), (16, 5084240), (20, 4067392), (28, 2905280), (32, 2542120), (35, 2324224), (40, 2033696), (49, 1660160), (56, 1452640), (64, 1271060), (70, 1162112), (80, 1016848), (98, 830080), (112, 726320), (128, 635530), (140, 581056), (160, 508424), (196, 415040), (224, 363160), (245, 332032), (256, 317765), (280, 290528), (320, 254212), (392, 207520), (448, 181580), (490, 166016), (560, 145264), (640, 127106), (784, 103760), (896, 90790), (980, 83008), (1120, 72632), (1280, 63553), (1297, 62720), (1568, 51880), (1792, 45395), (1960, 41504), (2240, 36316), (2594, 31360), (3136, 25940), (3920, 20752), (4480, 18158), (5188, 15680), (6272, 12970), (6485, 12544), (7840, 10376), (8960, 9079)]