21001690

素因数分解:

$2^1\times 5^1\times {\mathrm{61}}^1\times {\mathrm{34429}}^1$

素因数の和:34497

約数の個数: 16

約数和(自身を含む): 38423880

約数和(自身を除く): 17422190

約数列:

[1, 2, 5, 10, 61, 122, 305, 610, 34429, 68858, 172145, 344290, 2100169, 4200338, 10500845, 21001690]

約数ペア:

[(1, 21001690), (2, 10500845), (5, 4200338), (10, 2100169), (61, 344290), (122, 172145), (305, 68858), (610, 34429)]