205005220

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{209189}}^1$

素因数の和:209212

約数の個数: 36

約数和(自身を含む): 500800860

約数和(自身を除く): 295795640

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 209189, 418378, 836756, 1045945, 1464323, 2091890, 2928646, 4183780, 5857292, 7321615, 10250261, 14643230, 20500522, 29286460, 41001044, 51251305, 102502610, 205005220]

約数ペア:

[(1, 205005220), (2, 102502610), (4, 51251305), (5, 41001044), (7, 29286460), (10, 20500522), (14, 14643230), (20, 10250261), (28, 7321615), (35, 5857292), (49, 4183780), (70, 2928646), (98, 2091890), (140, 1464323), (196, 1045945), (245, 836756), (490, 418378), (980, 209189)]