251017221

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{70729}}^1$

素因数の和:70765

約数の個数: 24

約数和(自身を含む): 414194880

約数和(自身を除く): 163177659

約数列:

[1, 3, 7, 13, 21, 39, 91, 169, 273, 507, 1183, 3549, 70729, 212187, 495103, 919477, 1485309, 2758431, 6436339, 11953201, 19309017, 35859603, 83672407, 251017221]

約数ペア:

[(1, 251017221), (3, 83672407), (7, 35859603), (13, 19309017), (21, 11953201), (39, 6436339), (91, 2758431), (169, 1485309), (273, 919477), (507, 495103), (1183, 212187), (3549, 70729)]