19515920

素因数分解:

$2^4\times 5^1\times {\mathrm{89}}^1\times {\mathrm{2741}}^1$

素因数の和:2843

約数の個数: 40

約数和(自身を含む): 45901080

約数和(自身を除く): 26385160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 89, 178, 356, 445, 712, 890, 1424, 1780, 2741, 3560, 5482, 7120, 10964, 13705, 21928, 27410, 43856, 54820, 109640, 219280, 243949, 487898, 975796, 1219745, 1951592, 2439490, 3903184, 4878980, 9757960, 19515920]

約数ペア:

[(1, 19515920), (2, 9757960), (4, 4878980), (5, 3903184), (8, 2439490), (10, 1951592), (16, 1219745), (20, 975796), (40, 487898), (80, 243949), (89, 219280), (178, 109640), (356, 54820), (445, 43856), (712, 27410), (890, 21928), (1424, 13705), (1780, 10964), (2741, 7120), (3560, 5482)]