19455440

素因数分解:

$2^4\times 5^1\times {\mathrm{157}}^1\times {\mathrm{1549}}^1$

素因数の和:1719

約数の個数: 40

約数和(自身を含む): 45551400

約数和(自身を除く): 26095960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 157, 314, 628, 785, 1256, 1549, 1570, 2512, 3098, 3140, 6196, 6280, 7745, 12392, 12560, 15490, 24784, 30980, 61960, 123920, 243193, 486386, 972772, 1215965, 1945544, 2431930, 3891088, 4863860, 9727720, 19455440]

約数ペア:

[(1, 19455440), (2, 9727720), (4, 4863860), (5, 3891088), (8, 2431930), (10, 1945544), (16, 1215965), (20, 972772), (40, 486386), (80, 243193), (157, 123920), (314, 61960), (628, 30980), (785, 24784), (1256, 15490), (1549, 12560), (1570, 12392), (2512, 7745), (3098, 6280), (3140, 6196)]