20216140

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{197}}^1\times {\mathrm{733}}^1$

素因数の和:946

約数の個数: 48

約数和(自身を含む): 48831552

約数和(自身を除く): 28615412

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 197, 394, 733, 788, 985, 1379, 1466, 1970, 2758, 2932, 3665, 3940, 5131, 5516, 6895, 7330, 10262, 13790, 14660, 20524, 25655, 27580, 51310, 102620, 144401, 288802, 577604, 722005, 1010807, 1444010, 2021614, 2888020, 4043228, 5054035, 10108070, 20216140]

約数ペア:

[(1, 20216140), (2, 10108070), (4, 5054035), (5, 4043228), (7, 2888020), (10, 2021614), (14, 1444010), (20, 1010807), (28, 722005), (35, 577604), (70, 288802), (140, 144401), (197, 102620), (394, 51310), (733, 27580), (788, 25655), (985, 20524), (1379, 14660), (1466, 13790), (1970, 10262), (2758, 7330), (2932, 6895), (3665, 5516), (3940, 5131)]