1720355

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{199}}^1$

素因数の和:243

約数の個数: 32

約数和(自身を含む): 2688000

約数和(自身を除く): 967645

約数列:

[1, 5, 7, 13, 19, 35, 65, 91, 95, 133, 199, 247, 455, 665, 995, 1235, 1393, 1729, 2587, 3781, 6965, 8645, 12935, 18109, 18905, 26467, 49153, 90545, 132335, 245765, 344071, 1720355]

約数ペア:

[(1, 1720355), (5, 344071), (7, 245765), (13, 132335), (19, 90545), (35, 49153), (65, 26467), (91, 18905), (95, 18109), (133, 12935), (199, 8645), (247, 6965), (455, 3781), (665, 2587), (995, 1729), (1235, 1393)]