21199958

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{197}}^1\times {\mathrm{4139}}^1$

素因数の和:4351

約数の個数: 16

約数和(自身を含む): 34428240

約数和(自身を除く): 13228282

約数列:

[1, 2, 13, 26, 197, 394, 2561, 4139, 5122, 8278, 53807, 107614, 815383, 1630766, 10599979, 21199958]

約数ペア:

[(1, 21199958), (2, 10599979), (13, 1630766), (26, 815383), (197, 107614), (394, 53807), (2561, 8278), (4139, 5122)]