19874320

素因数分解:

$2^4\times 5^1\times {\mathrm{71}}^1\times {\mathrm{3499}}^1$

素因数の和:3583

約数の個数: 40

約数和(自身を含む): 46872000

約数和(自身を除く): 26997680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 71, 80, 142, 284, 355, 568, 710, 1136, 1420, 2840, 3499, 5680, 6998, 13996, 17495, 27992, 34990, 55984, 69980, 139960, 248429, 279920, 496858, 993716, 1242145, 1987432, 2484290, 3974864, 4968580, 9937160, 19874320]

約数ペア:

[(1, 19874320), (2, 9937160), (4, 4968580), (5, 3974864), (8, 2484290), (10, 1987432), (16, 1242145), (20, 993716), (40, 496858), (71, 279920), (80, 248429), (142, 139960), (284, 69980), (355, 55984), (568, 34990), (710, 27992), (1136, 17495), (1420, 13996), (2840, 6998), (3499, 5680)]