21869744

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{105143}}^1$

素因数の和:105164

約数の個数: 20

約数和(自身を含む): 45632496

約数和(自身を除く): 23762752

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 105143, 210286, 420572, 841144, 1366859, 1682288, 2733718, 5467436, 10934872, 21869744]

約数ペア:

[(1, 21869744), (2, 10934872), (4, 5467436), (8, 2733718), (13, 1682288), (16, 1366859), (26, 841144), (52, 420572), (104, 210286), (208, 105143)]