21505744

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{103393}}^1$

素因数の和:103414

約数の個数: 20

約数和(自身を含む): 44872996

約数和(自身を除く): 23367252

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 103393, 206786, 413572, 827144, 1344109, 1654288, 2688218, 5376436, 10752872, 21505744]

約数ペア:

[(1, 21505744), (2, 10752872), (4, 5376436), (8, 2688218), (13, 1654288), (16, 1344109), (26, 827144), (52, 413572), (104, 206786), (208, 103393)]