17991285

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{257}}^1\times {\mathrm{359}}^1$

素因数の和:637

約数の個数: 32

約数和(自身を含む): 31207680

約数和(自身を除く): 13216395

約数列:

[1, 3, 5, 13, 15, 39, 65, 195, 257, 359, 771, 1077, 1285, 1795, 3341, 3855, 4667, 5385, 10023, 14001, 16705, 23335, 50115, 70005, 92263, 276789, 461315, 1199419, 1383945, 3598257, 5997095, 17991285]

約数ペア:

[(1, 17991285), (3, 5997095), (5, 3598257), (13, 1383945), (15, 1199419), (39, 461315), (65, 276789), (195, 92263), (257, 70005), (359, 50115), (771, 23335), (1077, 16705), (1285, 14001), (1795, 10023), (3341, 5385), (3855, 4667)]