19721984

素因数分解:

$2^8\times {\mathrm{41}}^1\times {\mathrm{1879}}^1$

素因数の和:1936

約数の個数: 36

約数和(自身を含む): 40348560

約数和(自身を除く): 20626576

約数列:

[1, 2, 4, 8, 16, 32, 41, 64, 82, 128, 164, 256, 328, 656, 1312, 1879, 2624, 3758, 5248, 7516, 10496, 15032, 30064, 60128, 77039, 120256, 154078, 240512, 308156, 481024, 616312, 1232624, 2465248, 4930496, 9860992, 19721984]

約数ペア:

[(1, 19721984), (2, 9860992), (4, 4930496), (8, 2465248), (16, 1232624), (32, 616312), (41, 481024), (64, 308156), (82, 240512), (128, 154078), (164, 120256), (256, 77039), (328, 60128), (656, 30064), (1312, 15032), (1879, 10496), (2624, 7516), (3758, 5248)]