21017886

素因数分解:

$2^1\times 3^1\times {\mathrm{1621}}^1\times {\mathrm{2161}}^1$

素因数の和:3787

約数の個数: 16

約数和(自身を含む): 42081168

約数和(自身を除く): 21063282

約数列:

[1, 2, 3, 6, 1621, 2161, 3242, 4322, 4863, 6483, 9726, 12966, 3502981, 7005962, 10508943, 21017886]

約数ペア:

[(1, 21017886), (2, 10508943), (3, 7005962), (6, 3502981), (1621, 12966), (2161, 9726), (3242, 6483), (4322, 4863)]