51990320

素因数分解:

$2^4\times 5^1\times {\mathrm{649879}}^1$

素因数の和:649892

約数の個数: 20

約数和(自身を含む): 120877680

約数和(自身を除く): 68887360

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 649879, 1299758, 2599516, 3249395, 5199032, 6498790, 10398064, 12997580, 25995160, 51990320]

約数ペア:

[(1, 51990320), (2, 25995160), (4, 12997580), (5, 10398064), (8, 6498790), (10, 5199032), (16, 3249395), (20, 2599516), (40, 1299758), (80, 649879)]