191721985

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{211}}^1\times {\mathrm{1997}}^1$

素因数の和:2233

約数の個数: 32

約数和(自身を含む): 284643072

約数和(自身を除く): 92921087

約数列:

[1, 5, 7, 13, 35, 65, 91, 211, 455, 1055, 1477, 1997, 2743, 7385, 9985, 13715, 13979, 19201, 25961, 69895, 96005, 129805, 181727, 421367, 908635, 2106835, 2949569, 5477771, 14747845, 27388855, 38344397, 191721985]

約数ペア:

[(1, 191721985), (5, 38344397), (7, 27388855), (13, 14747845), (35, 5477771), (65, 2949569), (91, 2106835), (211, 908635), (455, 421367), (1055, 181727), (1477, 129805), (1997, 96005), (2743, 69895), (7385, 25961), (9985, 19201), (13715, 13979)]