21561280

素因数分解:

$2^6\times 5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1$

素因数の和:174

約数の個数: 112

約数和(自身を含む): 56839104

約数和(自身を除く): 35277824

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 71, 73, 80, 104, 130, 142, 146, 160, 208, 260, 284, 292, 320, 355, 365, 416, 520, 568, 584, 710, 730, 832, 923, 949, 1040, 1136, 1168, 1420, 1460, 1846, 1898, 2080, 2272, 2336, 2840, 2920, 3692, 3796, 4160, 4544, 4615, 4672, 4745, 5183, 5680, 5840, 7384, 7592, 9230, 9490, 10366, 11360, 11680, 14768, 15184, 18460, 18980, 20732, 22720, 23360, 25915, 29536, 30368, 36920, 37960, 41464, 51830, 59072, 60736, 67379, 73840, 75920, 82928, 103660, 134758, 147680, 151840, 165856, 207320, 269516, 295360, 303680, 331712, 336895, 414640, 539032, 673790, 829280, 1078064, 1347580, 1658560, 2156128, 2695160, 4312256, 5390320, 10780640, 21561280]

約数ペア:

[(1, 21561280), (2, 10780640), (4, 5390320), (5, 4312256), (8, 2695160), (10, 2156128), (13, 1658560), (16, 1347580), (20, 1078064), (26, 829280), (32, 673790), (40, 539032), (52, 414640), (64, 336895), (65, 331712), (71, 303680), (73, 295360), (80, 269516), (104, 207320), (130, 165856), (142, 151840), (146, 147680), (160, 134758), (208, 103660), (260, 82928), (284, 75920), (292, 73840), (320, 67379), (355, 60736), (365, 59072), (416, 51830), (520, 41464), (568, 37960), (584, 36920), (710, 30368), (730, 29536), (832, 25915), (923, 23360), (949, 22720), (1040, 20732), (1136, 18980), (1168, 18460), (1420, 15184), (1460, 14768), (1846, 11680), (1898, 11360), (2080, 10366), (2272, 9490), (2336, 9230), (2840, 7592), (2920, 7384), (3692, 5840), (3796, 5680), (4160, 5183), (4544, 4745), (4615, 4672)]