81263780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{312553}}^1$

素因数の和:312575

約数の個数: 24

約数和(自身を含む): 183781752

約数和(自身を除く): 102517972

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 312553, 625106, 1250212, 1562765, 3125530, 4063189, 6251060, 8126378, 16252756, 20315945, 40631890, 81263780]

約数ペア:

[(1, 81263780), (2, 40631890), (4, 20315945), (5, 16252756), (10, 8126378), (13, 6251060), (20, 4063189), (26, 3125530), (52, 1562765), (65, 1250212), (130, 625106), (260, 312553)]