19904829

素因数分解:

$3^1\times 7^2\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{67}}^1$

素因数の和:174

約数の個数: 48

約数和(自身を含む): 32744448

約数和(自身を除く): 12839619

約数列:

[1, 3, 7, 21, 43, 47, 49, 67, 129, 141, 147, 201, 301, 329, 469, 903, 987, 1407, 2021, 2107, 2303, 2881, 3149, 3283, 6063, 6321, 6909, 8643, 9447, 9849, 14147, 20167, 22043, 42441, 60501, 66129, 99029, 135407, 141169, 154301, 297087, 406221, 423507, 462903, 947849, 2843547, 6634943, 19904829]

約数ペア:

[(1, 19904829), (3, 6634943), (7, 2843547), (21, 947849), (43, 462903), (47, 423507), (49, 406221), (67, 297087), (129, 154301), (141, 141169), (147, 135407), (201, 99029), (301, 66129), (329, 60501), (469, 42441), (903, 22043), (987, 20167), (1407, 14147), (2021, 9849), (2107, 9447), (2303, 8643), (2881, 6909), (3149, 6321), (3283, 6063)]