21806360

素因数分解:

$2^3\times 5^1\times {\mathrm{239}}^1\times {\mathrm{2281}}^1$

素因数の和:2531

約数の個数: 32

約数和(自身を含む): 49291200

約数和(自身を除く): 27484840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 239, 478, 956, 1195, 1912, 2281, 2390, 4562, 4780, 9124, 9560, 11405, 18248, 22810, 45620, 91240, 545159, 1090318, 2180636, 2725795, 4361272, 5451590, 10903180, 21806360]

約数ペア:

[(1, 21806360), (2, 10903180), (4, 5451590), (5, 4361272), (8, 2725795), (10, 2180636), (20, 1090318), (40, 545159), (239, 91240), (478, 45620), (956, 22810), (1195, 18248), (1912, 11405), (2281, 9560), (2390, 9124), (4562, 4780)]