81204320

素因数分解:

$2^5\times 5^1\times {\mathrm{503}}^1\times {\mathrm{1009}}^1$

素因数の和:1527

約数の個数: 48

約数和(自身を含む): 192417120

約数和(自身を除く): 111212800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 503, 1006, 1009, 2012, 2018, 2515, 4024, 4036, 5030, 5045, 8048, 8072, 10060, 10090, 16096, 16144, 20120, 20180, 32288, 40240, 40360, 80480, 80720, 161440, 507527, 1015054, 2030108, 2537635, 4060216, 5075270, 8120432, 10150540, 16240864, 20301080, 40602160, 81204320]

約数ペア:

[(1, 81204320), (2, 40602160), (4, 20301080), (5, 16240864), (8, 10150540), (10, 8120432), (16, 5075270), (20, 4060216), (32, 2537635), (40, 2030108), (80, 1015054), (160, 507527), (503, 161440), (1006, 80720), (1009, 80480), (2012, 40360), (2018, 40240), (2515, 32288), (4024, 20180), (4036, 20120), (5030, 16144), (5045, 16096), (8048, 10090), (8072, 10060)]