217892720

素因数分解:

$2^4\times 5^1\times {\mathrm{509}}^1\times {\mathrm{5351}}^1$

素因数の和:5873

約数の個数: 40

約数和(自身を含む): 507690720

約数和(自身を除く): 289798000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 509, 1018, 2036, 2545, 4072, 5090, 5351, 8144, 10180, 10702, 20360, 21404, 26755, 40720, 42808, 53510, 85616, 107020, 214040, 428080, 2723659, 5447318, 10894636, 13618295, 21789272, 27236590, 43578544, 54473180, 108946360, 217892720]

約数ペア:

[(1, 217892720), (2, 108946360), (4, 54473180), (5, 43578544), (8, 27236590), (10, 21789272), (16, 13618295), (20, 10894636), (40, 5447318), (80, 2723659), (509, 428080), (1018, 214040), (2036, 107020), (2545, 85616), (4072, 53510), (5090, 42808), (5351, 40720), (8144, 26755), (10180, 21404), (10702, 20360)]