19984447

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{139}}^1$

素因数の和:235

約数の個数: 32

約数和(自身を含む): 25804800

約数和(自身を除く): 5820353

約数列:

[1, 7, 19, 23, 47, 133, 139, 161, 329, 437, 893, 973, 1081, 2641, 3059, 3197, 6251, 6533, 7567, 18487, 20539, 22379, 45731, 60743, 124127, 143773, 150259, 425201, 868889, 1051813, 2854921, 19984447]

約数ペア:

[(1, 19984447), (7, 2854921), (19, 1051813), (23, 868889), (47, 425201), (133, 150259), (139, 143773), (161, 124127), (329, 60743), (437, 45731), (893, 22379), (973, 20539), (1081, 18487), (2641, 7567), (3059, 6533), (3197, 6251)]