19811835

素因数分解:

$3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{73}}^1\times {\mathrm{163}}^1$

素因数の和:284

約数の個数: 48

約数和(自身を含む): 35971104

約数和(自身を除く): 16159269

約数列:

[1, 3, 5, 9, 15, 37, 45, 73, 111, 163, 185, 219, 333, 365, 489, 555, 657, 815, 1095, 1467, 1665, 2445, 2701, 3285, 6031, 7335, 8103, 11899, 13505, 18093, 24309, 30155, 35697, 40515, 54279, 59495, 90465, 107091, 121545, 178485, 271395, 440263, 535455, 1320789, 2201315, 3962367, 6603945, 19811835]

約数ペア:

[(1, 19811835), (3, 6603945), (5, 3962367), (9, 2201315), (15, 1320789), (37, 535455), (45, 440263), (73, 271395), (111, 178485), (163, 121545), (185, 107091), (219, 90465), (333, 59495), (365, 54279), (489, 40515), (555, 35697), (657, 30155), (815, 24309), (1095, 18093), (1467, 13505), (1665, 11899), (2445, 8103), (2701, 7335), (3285, 6031)]