20981770

素因数分解:

$2^1\times 5^1\times {\mathrm{449}}^1\times {\mathrm{4673}}^1$

素因数の和:5129

約数の個数: 16

約数和(自身を含む): 37859400

約数和(自身を除く): 16877630

約数列:

[1, 2, 5, 10, 449, 898, 2245, 4490, 4673, 9346, 23365, 46730, 2098177, 4196354, 10490885, 20981770]

約数ペア:

[(1, 20981770), (2, 10490885), (5, 4196354), (10, 2098177), (449, 46730), (898, 23365), (2245, 9346), (4490, 4673)]