21990231

素因数分解:

$3^3\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{2083}}^1$

素因数の和:2132

約数の個数: 32

約数和(自身を含む): 36011520

約数和(自身を除く): 14021289

約数列:

[1, 3, 9, 17, 23, 27, 51, 69, 153, 207, 391, 459, 621, 1173, 2083, 3519, 6249, 10557, 18747, 35411, 47909, 56241, 106233, 143727, 318699, 431181, 814453, 956097, 1293543, 2443359, 7330077, 21990231]

約数ペア:

[(1, 21990231), (3, 7330077), (9, 2443359), (17, 1293543), (23, 956097), (27, 814453), (51, 431181), (69, 318699), (153, 143727), (207, 106233), (391, 56241), (459, 47909), (621, 35411), (1173, 18747), (2083, 10557), (3519, 6249)]