19728986

素因数分解:

$2^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{79}}^1\times {\mathrm{89}}^1$

素因数の和:254

約数の個数: 32

約数和(自身を含む): 32140800

約数和(自身を除く): 12411814

約数列:

[1, 2, 23, 46, 61, 79, 89, 122, 158, 178, 1403, 1817, 2047, 2806, 3634, 4094, 4819, 5429, 7031, 9638, 10858, 14062, 110837, 124867, 161713, 221674, 249734, 323426, 428891, 857782, 9864493, 19728986]

約数ペア:

[(1, 19728986), (2, 9864493), (23, 857782), (46, 428891), (61, 323426), (79, 249734), (89, 221674), (122, 161713), (158, 124867), (178, 110837), (1403, 14062), (1817, 10858), (2047, 9638), (2806, 7031), (3634, 5429), (4094, 4819)]