21081167240

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{661}}^1\times {\mathrm{113903}}^1$

素因数の和:114582

約数の個数: 64

約数和(自身を含む): 54291202560

約数和(自身を除く): 33210035320

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 661, 1322, 2644, 3305, 4627, 5288, 6610, 9254, 13220, 18508, 23135, 26440, 37016, 46270, 92540, 113903, 185080, 227806, 455612, 569515, 797321, 911224, 1139030, 1594642, 2278060, 3189284, 3986605, 4556120, 6378568, 7973210, 15946420, 31892840, 75289883, 150579766, 301159532, 376449415, 527029181, 602319064, 752898830, 1054058362, 1505797660, 2108116724, 2635145905, 3011595320, 4216233448, 5270291810, 10540583620, 21081167240]

約数ペア:

[(1, 21081167240), (2, 10540583620), (4, 5270291810), (5, 4216233448), (7, 3011595320), (8, 2635145905), (10, 2108116724), (14, 1505797660), (20, 1054058362), (28, 752898830), (35, 602319064), (40, 527029181), (56, 376449415), (70, 301159532), (140, 150579766), (280, 75289883), (661, 31892840), (1322, 15946420), (2644, 7973210), (3305, 6378568), (4627, 4556120), (5288, 3986605), (6610, 3189284), (9254, 2278060), (13220, 1594642), (18508, 1139030), (23135, 911224), (26440, 797321), (37016, 569515), (46270, 455612), (92540, 227806), (113903, 185080)]