21193978

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{887}}^1\times {\mathrm{919}}^1$

素因数の和:1821

約数の個数: 16

約数和(自身を含む): 34312320

約数和(自身を除く): 13118342

約数列:

[1, 2, 13, 26, 887, 919, 1774, 1838, 11531, 11947, 23062, 23894, 815153, 1630306, 10596989, 21193978]

約数ペア:

[(1, 21193978), (2, 10596989), (13, 1630306), (26, 815153), (887, 23894), (919, 23062), (1774, 11947), (1838, 11531)]