21521968

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{103471}}^1$

素因数の和:103492

約数の個数: 20

約数和(自身を含む): 44906848

約数和(自身を除く): 23384880

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 103471, 206942, 413884, 827768, 1345123, 1655536, 2690246, 5380492, 10760984, 21521968]

約数ペア:

[(1, 21521968), (2, 10760984), (4, 5380492), (8, 2690246), (13, 1655536), (16, 1345123), (26, 827768), (52, 413884), (104, 206942), (208, 103471)]