20781522

素因数分解:

$2^1\times 3^4\times {\mathrm{163}}^1\times {\mathrm{787}}^1$

素因数の和:964

約数の個数: 40

約数和(自身を含む): 46911216

約数和(自身を除く): 26129694

約数列:

[1, 2, 3, 6, 9, 18, 27, 54, 81, 162, 163, 326, 489, 787, 978, 1467, 1574, 2361, 2934, 4401, 4722, 7083, 8802, 13203, 14166, 21249, 26406, 42498, 63747, 127494, 128281, 256562, 384843, 769686, 1154529, 2309058, 3463587, 6927174, 10390761, 20781522]

約数ペア:

[(1, 20781522), (2, 10390761), (3, 6927174), (6, 3463587), (9, 2309058), (18, 1154529), (27, 769686), (54, 384843), (81, 256562), (162, 128281), (163, 127494), (326, 63747), (489, 42498), (787, 26406), (978, 21249), (1467, 14166), (1574, 13203), (2361, 8802), (2934, 7083), (4401, 4722)]