402020120

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{112927}}^1$

素因数の和:113027

約数の個数: 32

約数和(自身を含む): 914716800

約数和(自身を除く): 512696680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 112927, 225854, 451708, 564635, 903416, 1129270, 2258540, 4517080, 10050503, 20101006, 40202012, 50252515, 80404024, 100505030, 201010060, 402020120]

約数ペア:

[(1, 402020120), (2, 201010060), (4, 100505030), (5, 80404024), (8, 50252515), (10, 40202012), (20, 20101006), (40, 10050503), (89, 4517080), (178, 2258540), (356, 1129270), (445, 903416), (712, 564635), (890, 451708), (1780, 225854), (3560, 112927)]