19781984

素因数分解:

$2^5\times {\mathrm{503}}^1\times {\mathrm{1229}}^1$

素因数の和:1742

約数の個数: 24

約数和(自身を含む): 39054960

約数和(自身を除く): 19272976

約数列:

[1, 2, 4, 8, 16, 32, 503, 1006, 1229, 2012, 2458, 4024, 4916, 8048, 9832, 16096, 19664, 39328, 618187, 1236374, 2472748, 4945496, 9890992, 19781984]

約数ペア:

[(1, 19781984), (2, 9890992), (4, 4945496), (8, 2472748), (16, 1236374), (32, 618187), (503, 39328), (1006, 19664), (1229, 16096), (2012, 9832), (2458, 8048), (4024, 4916)]