21949917

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{17977}}^1$

素因数の和:18028

約数の個数: 16

約数和(自身を含む): 32791872

約数和(自身を除く): 10841955

約数列:

[1, 3, 11, 33, 37, 111, 407, 1221, 17977, 53931, 197747, 593241, 665149, 1995447, 7316639, 21949917]

約数ペア:

[(1, 21949917), (3, 7316639), (11, 1995447), (33, 665149), (37, 593241), (111, 197747), (407, 53931), (1221, 17977)]