4000720

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{1163}}^1$

素因数の和:1219

約数の個数: 40

約数和(自身を含む): 9526176

約数和(自身を除く): 5525456

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 172, 215, 344, 430, 688, 860, 1163, 1720, 2326, 3440, 4652, 5815, 9304, 11630, 18608, 23260, 46520, 50009, 93040, 100018, 200036, 250045, 400072, 500090, 800144, 1000180, 2000360, 4000720]

約数ペア:

[(1, 4000720), (2, 2000360), (4, 1000180), (5, 800144), (8, 500090), (10, 400072), (16, 250045), (20, 200036), (40, 100018), (43, 93040), (80, 50009), (86, 46520), (172, 23260), (215, 18608), (344, 11630), (430, 9304), (688, 5815), (860, 4652), (1163, 3440), (1720, 2326)]