19912857560

素因数分解:

$2^3\times 5^1\times {\mathrm{1559}}^1\times {\mathrm{319321}}^1$

素因数の和:320891

約数の個数: 32

約数和(自身を含む): 44832808800

約数和(自身を除く): 24919951240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1559, 3118, 6236, 7795, 12472, 15590, 31180, 62360, 319321, 638642, 1277284, 1596605, 2554568, 3193210, 6386420, 12772840, 497821439, 995642878, 1991285756, 2489107195, 3982571512, 4978214390, 9956428780, 19912857560]

約数ペア:

[(1, 19912857560), (2, 9956428780), (4, 4978214390), (5, 3982571512), (8, 2489107195), (10, 1991285756), (20, 995642878), (40, 497821439), (1559, 12772840), (3118, 6386420), (6236, 3193210), (7795, 2554568), (12472, 1596605), (15590, 1277284), (31180, 638642), (62360, 319321)]