2000720

素因数分解:

$2^4\times 5^1\times {\mathrm{89}}^1\times {\mathrm{281}}^1$

素因数の和:383

約数の個数: 40

約数和(自身を含む): 4720680

約数和(自身を除く): 2719960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 89, 178, 281, 356, 445, 562, 712, 890, 1124, 1405, 1424, 1780, 2248, 2810, 3560, 4496, 5620, 7120, 11240, 22480, 25009, 50018, 100036, 125045, 200072, 250090, 400144, 500180, 1000360, 2000720]

約数ペア:

[(1, 2000720), (2, 1000360), (4, 500180), (5, 400144), (8, 250090), (10, 200072), (16, 125045), (20, 100036), (40, 50018), (80, 25009), (89, 22480), (178, 11240), (281, 7120), (356, 5620), (445, 4496), (562, 3560), (712, 2810), (890, 2248), (1124, 1780), (1405, 1424)]