21392240

素因数分解:

$2^4\times 5^1\times {\mathrm{267403}}^1$

素因数の和:267416

約数の個数: 20

約数和(自身を含む): 49737144

約数和(自身を除く): 28344904

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 267403, 534806, 1069612, 1337015, 2139224, 2674030, 4278448, 5348060, 10696120, 21392240]

約数ペア:

[(1, 21392240), (2, 10696120), (4, 5348060), (5, 4278448), (8, 2674030), (10, 2139224), (16, 1337015), (20, 1069612), (40, 534806), (80, 267403)]