21138770

素因数分解:

$2^1\times 5^1\times {\mathrm{509}}^1\times {\mathrm{4153}}^1$

素因数の和:4669

約数の個数: 16

約数和(自身を含む): 38133720

約数和(自身を除く): 16994950

約数列:

[1, 2, 5, 10, 509, 1018, 2545, 4153, 5090, 8306, 20765, 41530, 2113877, 4227754, 10569385, 21138770]

約数ペア:

[(1, 21138770), (2, 10569385), (5, 4227754), (10, 2113877), (509, 41530), (1018, 20765), (2545, 8306), (4153, 5090)]