19489520

素因数分解:

$2^4\times 5^1\times {\mathrm{179}}^1\times {\mathrm{1361}}^1$

素因数の和:1553

約数の個数: 40

約数和(自身を含む): 45599760

約数和(自身を除く): 26110240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 179, 358, 716, 895, 1361, 1432, 1790, 2722, 2864, 3580, 5444, 6805, 7160, 10888, 13610, 14320, 21776, 27220, 54440, 108880, 243619, 487238, 974476, 1218095, 1948952, 2436190, 3897904, 4872380, 9744760, 19489520]

約数ペア:

[(1, 19489520), (2, 9744760), (4, 4872380), (5, 3897904), (8, 2436190), (10, 1948952), (16, 1218095), (20, 974476), (40, 487238), (80, 243619), (179, 108880), (358, 54440), (716, 27220), (895, 21776), (1361, 14320), (1432, 13610), (1790, 10888), (2722, 7160), (2864, 6805), (3580, 5444)]