20172040

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{72043}}^1$

素因数の和:72061

約数の個数: 32

約数和(自身を含む): 51871680

約数和(自身を除く): 31699640

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 72043, 144086, 288172, 360215, 504301, 576344, 720430, 1008602, 1440860, 2017204, 2521505, 2881720, 4034408, 5043010, 10086020, 20172040]

約数ペア:

[(1, 20172040), (2, 10086020), (4, 5043010), (5, 4034408), (7, 2881720), (8, 2521505), (10, 2017204), (14, 1440860), (20, 1008602), (28, 720430), (35, 576344), (40, 504301), (56, 360215), (70, 288172), (140, 144086), (280, 72043)]