20956257

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^2\times {\mathrm{1151}}^1$

素因数の和:1198

約数の個数: 36

約数和(自身を含む): 36781056

約数和(自身を除く): 15824799

約数列:

[1, 3, 7, 9, 17, 21, 51, 63, 119, 153, 289, 357, 867, 1071, 1151, 2023, 2601, 3453, 6069, 8057, 10359, 18207, 19567, 24171, 58701, 72513, 136969, 176103, 332639, 410907, 997917, 1232721, 2328473, 2993751, 6985419, 20956257]

約数ペア:

[(1, 20956257), (3, 6985419), (7, 2993751), (9, 2328473), (17, 1232721), (21, 997917), (51, 410907), (63, 332639), (119, 176103), (153, 136969), (289, 72513), (357, 58701), (867, 24171), (1071, 19567), (1151, 18207), (2023, 10359), (2601, 8057), (3453, 6069)]