19681683

素因数分解:

$3^1\times 7^3\times {\mathrm{31}}^1\times {\mathrm{617}}^1$

素因数の和:672

約数の個数: 32

約数和(自身を含む): 31641600

約数和(自身を除く): 11959917

約数列:

[1, 3, 7, 21, 31, 49, 93, 147, 217, 343, 617, 651, 1029, 1519, 1851, 4319, 4557, 10633, 12957, 19127, 30233, 31899, 57381, 90699, 133889, 211631, 401667, 634893, 937223, 2811669, 6560561, 19681683]

約数ペア:

[(1, 19681683), (3, 6560561), (7, 2811669), (21, 937223), (31, 634893), (49, 401667), (93, 211631), (147, 133889), (217, 90699), (343, 57381), (617, 31899), (651, 30233), (1029, 19127), (1519, 12957), (1851, 10633), (4319, 4557)]