640054872

素因数分解:

$2^3\times 3^4\times {\mathrm{987739}}^1$

素因数の和:987757

約数の個数: 40

約数和(自身を含む): 1792748100

約数和(自身を除く): 1152693228

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 27, 36, 54, 72, 81, 108, 162, 216, 324, 648, 987739, 1975478, 2963217, 3950956, 5926434, 7901912, 8889651, 11852868, 17779302, 23705736, 26668953, 35558604, 53337906, 71117208, 80006859, 106675812, 160013718, 213351624, 320027436, 640054872]

約数ペア:

[(1, 640054872), (2, 320027436), (3, 213351624), (4, 160013718), (6, 106675812), (8, 80006859), (9, 71117208), (12, 53337906), (18, 35558604), (24, 26668953), (27, 23705736), (36, 17779302), (54, 11852868), (72, 8889651), (81, 7901912), (108, 5926434), (162, 3950956), (216, 2963217), (324, 1975478), (648, 987739)]