20120840

素因数分解:

$2^3\times 5^1\times {\mathrm{661}}^1\times {\mathrm{761}}^1$

素因数の和:1433

約数の個数: 32

約数和(自身を含む): 45399960

約数和(自身を除く): 25279120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 661, 761, 1322, 1522, 2644, 3044, 3305, 3805, 5288, 6088, 6610, 7610, 13220, 15220, 26440, 30440, 503021, 1006042, 2012084, 2515105, 4024168, 5030210, 10060420, 20120840]

約数ペア:

[(1, 20120840), (2, 10060420), (4, 5030210), (5, 4024168), (8, 2515105), (10, 2012084), (20, 1006042), (40, 503021), (661, 30440), (761, 26440), (1322, 15220), (1522, 13220), (2644, 7610), (3044, 6610), (3305, 6088), (3805, 5288)]