21161978

素因数分解:

$2^1\times {\mathrm{23}}^1\times {\mathrm{521}}^1\times {\mathrm{883}}^1$

素因数の和:1429

約数の個数: 16

約数和(自身を含む): 33224256

約数和(自身を除く): 12062278

約数列:

[1, 2, 23, 46, 521, 883, 1042, 1766, 11983, 20309, 23966, 40618, 460043, 920086, 10580989, 21161978]

約数ペア:

[(1, 21161978), (2, 10580989), (23, 920086), (46, 460043), (521, 40618), (883, 23966), (1042, 20309), (1766, 11983)]