21388856

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{157271}}^1$

素因数の和:157294

約数の個数: 16

約数和(自身を含む): 42463440

約数和(自身を除く): 21074584

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 157271, 314542, 629084, 1258168, 2673607, 5347214, 10694428, 21388856]

約数ペア:

[(1, 21388856), (2, 10694428), (4, 5347214), (8, 2673607), (17, 1258168), (34, 629084), (68, 314542), (136, 157271)]