21238916

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{547}}^1\times {\mathrm{571}}^1$

素因数の和:1139

約数の個数: 24

約数和(自身を含む): 39495456

約数和(自身を除く): 18256540

約数列:

[1, 2, 4, 17, 34, 68, 547, 571, 1094, 1142, 2188, 2284, 9299, 9707, 18598, 19414, 37196, 38828, 312337, 624674, 1249348, 5309729, 10619458, 21238916]

約数ペア:

[(1, 21238916), (2, 10619458), (4, 5309729), (17, 1249348), (34, 624674), (68, 312337), (547, 38828), (571, 37196), (1094, 19414), (1142, 18598), (2188, 9707), (2284, 9299)]