21150316

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{89}}^1\times {\mathrm{491}}^1$

素因数の和:606

約数の個数: 36

約数和(自身を含む): 41224680

約数和(自身を除く): 20074364

約数列:

[1, 2, 4, 11, 22, 44, 89, 121, 178, 242, 356, 484, 491, 979, 982, 1958, 1964, 3916, 5401, 10769, 10802, 21538, 21604, 43076, 43699, 59411, 87398, 118822, 174796, 237644, 480689, 961378, 1922756, 5287579, 10575158, 21150316]

約数ペア:

[(1, 21150316), (2, 10575158), (4, 5287579), (11, 1922756), (22, 961378), (44, 480689), (89, 237644), (121, 174796), (178, 118822), (242, 87398), (356, 59411), (484, 43699), (491, 43076), (979, 21604), (982, 21538), (1958, 10802), (1964, 10769), (3916, 5401)]