399189232

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{61909}}^1$

素因数の和:61961

約数の個数: 40

約数和(自身を含む): 859806080

約数和(自身を除く): 460616848

約数列:

[1, 2, 4, 8, 13, 16, 26, 31, 52, 62, 104, 124, 208, 248, 403, 496, 806, 1612, 3224, 6448, 61909, 123818, 247636, 495272, 804817, 990544, 1609634, 1919179, 3219268, 3838358, 6438536, 7676716, 12877072, 15353432, 24949327, 30706864, 49898654, 99797308, 199594616, 399189232]

約数ペア:

[(1, 399189232), (2, 199594616), (4, 99797308), (8, 49898654), (13, 30706864), (16, 24949327), (26, 15353432), (31, 12877072), (52, 7676716), (62, 6438536), (104, 3838358), (124, 3219268), (208, 1919179), (248, 1609634), (403, 990544), (496, 804817), (806, 495272), (1612, 247636), (3224, 123818), (6448, 61909)]