20921936

素因数分解:

$2^4\times 7^1\times {\mathrm{367}}^1\times {\mathrm{509}}^1$

素因数の和:891

約数の個数: 40

約数和(自身を含む): 46544640

約数和(自身を除く): 25622704

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 367, 509, 734, 1018, 1468, 2036, 2569, 2936, 3563, 4072, 5138, 5872, 7126, 8144, 10276, 14252, 20552, 28504, 41104, 57008, 186803, 373606, 747212, 1307621, 1494424, 2615242, 2988848, 5230484, 10460968, 20921936]

約数ペア:

[(1, 20921936), (2, 10460968), (4, 5230484), (7, 2988848), (8, 2615242), (14, 1494424), (16, 1307621), (28, 747212), (56, 373606), (112, 186803), (367, 57008), (509, 41104), (734, 28504), (1018, 20552), (1468, 14252), (2036, 10276), (2569, 8144), (2936, 7126), (3563, 5872), (4072, 5138)]