12740975

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{197}}^1\times {\mathrm{199}}^1$

素因数の和:419

約数の個数: 24

約数和(自身を含む): 17186400

約数和(自身を除く): 4445425

約数列:

[1, 5, 13, 25, 65, 197, 199, 325, 985, 995, 2561, 2587, 4925, 4975, 12805, 12935, 39203, 64025, 64675, 196015, 509639, 980075, 2548195, 12740975]

約数ペア:

[(1, 12740975), (5, 2548195), (13, 980075), (25, 509639), (65, 196015), (197, 64675), (199, 64025), (325, 39203), (985, 12935), (995, 12805), (2561, 4975), (2587, 4925)]