19979728

素因数分解:

$2^4\times {\mathrm{53}}^1\times {\mathrm{23561}}^1$

素因数の和:23622

約数の個数: 20

約数和(自身を含む): 39442788

約数和(自身を除く): 19463060

約数列:

[1, 2, 4, 8, 16, 53, 106, 212, 424, 848, 23561, 47122, 94244, 188488, 376976, 1248733, 2497466, 4994932, 9989864, 19979728]

約数ペア:

[(1, 19979728), (2, 9989864), (4, 4994932), (8, 2497466), (16, 1248733), (53, 376976), (106, 188488), (212, 94244), (424, 47122), (848, 23561)]