81284560

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{3923}}^1$

素因数の和:3980

約数の個数: 80

約数和(自身を含む): 221878656

約数和(自身を除く): 140594096

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 37, 40, 56, 70, 74, 80, 112, 140, 148, 185, 259, 280, 296, 370, 518, 560, 592, 740, 1036, 1295, 1480, 2072, 2590, 2960, 3923, 4144, 5180, 7846, 10360, 15692, 19615, 20720, 27461, 31384, 39230, 54922, 62768, 78460, 109844, 137305, 145151, 156920, 219688, 274610, 290302, 313840, 439376, 549220, 580604, 725755, 1016057, 1098440, 1161208, 1451510, 2032114, 2196880, 2322416, 2903020, 4064228, 5080285, 5806040, 8128456, 10160570, 11612080, 16256912, 20321140, 40642280, 81284560]

約数ペア:

[(1, 81284560), (2, 40642280), (4, 20321140), (5, 16256912), (7, 11612080), (8, 10160570), (10, 8128456), (14, 5806040), (16, 5080285), (20, 4064228), (28, 2903020), (35, 2322416), (37, 2196880), (40, 2032114), (56, 1451510), (70, 1161208), (74, 1098440), (80, 1016057), (112, 725755), (140, 580604), (148, 549220), (185, 439376), (259, 313840), (280, 290302), (296, 274610), (370, 219688), (518, 156920), (560, 145151), (592, 137305), (740, 109844), (1036, 78460), (1295, 62768), (1480, 54922), (2072, 39230), (2590, 31384), (2960, 27461), (3923, 20720), (4144, 19615), (5180, 15692), (7846, 10360)]