80078020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{181}}^1\times {\mathrm{2011}}^1$

素因数の和:2212

約数の個数: 48

約数和(自身を含む): 184556736

約数和(自身を除く): 104478716

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 181, 220, 362, 724, 905, 1810, 1991, 2011, 3620, 3982, 4022, 7964, 8044, 9955, 10055, 19910, 20110, 22121, 39820, 40220, 44242, 88484, 110605, 221210, 363991, 442420, 727982, 1455964, 1819955, 3639910, 4003901, 7279820, 8007802, 16015604, 20019505, 40039010, 80078020]

約数ペア:

[(1, 80078020), (2, 40039010), (4, 20019505), (5, 16015604), (10, 8007802), (11, 7279820), (20, 4003901), (22, 3639910), (44, 1819955), (55, 1455964), (110, 727982), (181, 442420), (220, 363991), (362, 221210), (724, 110605), (905, 88484), (1810, 44242), (1991, 40220), (2011, 39820), (3620, 22121), (3982, 20110), (4022, 19910), (7964, 10055), (8044, 9955)]