20515550

素因数分解:

$2^1\times 5^2\times {\mathrm{11}}^2\times {\mathrm{3391}}^1$

素因数の和:3425

約数の個数: 36

約数和(自身を含む): 41955648

約数和(自身を除く): 21440098

約数列:

[1, 2, 5, 10, 11, 22, 25, 50, 55, 110, 121, 242, 275, 550, 605, 1210, 3025, 3391, 6050, 6782, 16955, 33910, 37301, 74602, 84775, 169550, 186505, 373010, 410311, 820622, 932525, 1865050, 2051555, 4103110, 10257775, 20515550]

約数ペア:

[(1, 20515550), (2, 10257775), (5, 4103110), (10, 2051555), (11, 1865050), (22, 932525), (25, 820622), (50, 410311), (55, 373010), (110, 186505), (121, 169550), (242, 84775), (275, 74602), (550, 37301), (605, 33910), (1210, 16955), (3025, 6782), (3391, 6050)]