8720530

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{37}}^2$

素因数の和:108

約数の個数: 72

約数和(自身を含む): 20210148

約数和(自身を除く): 11489618

約数列:

[1, 2, 5, 7, 10, 13, 14, 26, 35, 37, 49, 65, 70, 74, 91, 98, 130, 182, 185, 245, 259, 370, 455, 481, 490, 518, 637, 910, 962, 1274, 1295, 1369, 1813, 2405, 2590, 2738, 3185, 3367, 3626, 4810, 6370, 6734, 6845, 9065, 9583, 13690, 16835, 17797, 18130, 19166, 23569, 33670, 35594, 47138, 47915, 67081, 88985, 95830, 117845, 124579, 134162, 177970, 235690, 249158, 335405, 622895, 670810, 872053, 1245790, 1744106, 4360265, 8720530]

約数ペア:

[(1, 8720530), (2, 4360265), (5, 1744106), (7, 1245790), (10, 872053), (13, 670810), (14, 622895), (26, 335405), (35, 249158), (37, 235690), (49, 177970), (65, 134162), (70, 124579), (74, 117845), (91, 95830), (98, 88985), (130, 67081), (182, 47915), (185, 47138), (245, 35594), (259, 33670), (370, 23569), (455, 19166), (481, 18130), (490, 17797), (518, 16835), (637, 13690), (910, 9583), (962, 9065), (1274, 6845), (1295, 6734), (1369, 6370), (1813, 4810), (2405, 3626), (2590, 3367), (2738, 3185)]