251731285

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{317}}^1\times {\mathrm{643}}^1$

素因数の和:997

約数の個数: 32

約数和(自身を含む): 344050560

約数和(自身を除く): 92319275

約数列:

[1, 5, 13, 19, 65, 95, 247, 317, 643, 1235, 1585, 3215, 4121, 6023, 8359, 12217, 20605, 30115, 41795, 61085, 78299, 158821, 203831, 391495, 794105, 1019155, 2649803, 3872789, 13249015, 19363945, 50346257, 251731285]

約数ペア:

[(1, 251731285), (5, 50346257), (13, 19363945), (19, 13249015), (65, 3872789), (95, 2649803), (247, 1019155), (317, 794105), (643, 391495), (1235, 203831), (1585, 158821), (3215, 78299), (4121, 61085), (6023, 41795), (8359, 30115), (12217, 20605)]