19939000

素因数分解:

$2^3\times 5^3\times {\mathrm{127}}^1\times {\mathrm{157}}^1$

素因数の和:305

約数の個数: 64

約数和(自身を含む): 47324160

約数和(自身を除く): 27385160

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 127, 157, 200, 250, 254, 314, 500, 508, 628, 635, 785, 1000, 1016, 1256, 1270, 1570, 2540, 3140, 3175, 3925, 5080, 6280, 6350, 7850, 12700, 15700, 15875, 19625, 19939, 25400, 31400, 31750, 39250, 39878, 63500, 78500, 79756, 99695, 127000, 157000, 159512, 199390, 398780, 498475, 797560, 996950, 1993900, 2492375, 3987800, 4984750, 9969500, 19939000]

約数ペア:

[(1, 19939000), (2, 9969500), (4, 4984750), (5, 3987800), (8, 2492375), (10, 1993900), (20, 996950), (25, 797560), (40, 498475), (50, 398780), (100, 199390), (125, 159512), (127, 157000), (157, 127000), (200, 99695), (250, 79756), (254, 78500), (314, 63500), (500, 39878), (508, 39250), (628, 31750), (635, 31400), (785, 25400), (1000, 19939), (1016, 19625), (1256, 15875), (1270, 15700), (1570, 12700), (2540, 7850), (3140, 6350), (3175, 6280), (3925, 5080)]