21991077

素因数分解:

$3^2\times {\mathrm{29}}^1\times {\mathrm{109}}^1\times {\mathrm{773}}^1$

素因数の和:917

約数の個数: 24

約数和(自身を含む): 33204600

約数和(自身を除く): 11213523

約数列:

[1, 3, 9, 29, 87, 109, 261, 327, 773, 981, 2319, 3161, 6957, 9483, 22417, 28449, 67251, 84257, 201753, 252771, 758313, 2443453, 7330359, 21991077]

約数ペア:

[(1, 21991077), (3, 7330359), (9, 2443453), (29, 758313), (87, 252771), (109, 201753), (261, 84257), (327, 67251), (773, 28449), (981, 22417), (2319, 9483), (3161, 6957)]