20921080

素因数分解:

$2^3\times 5^1\times {\mathrm{563}}^1\times {\mathrm{929}}^1$

素因数の和:1503

約数の個数: 32

約数和(自身を含む): 47206800

約数和(自身を除く): 26285720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 563, 929, 1126, 1858, 2252, 2815, 3716, 4504, 4645, 5630, 7432, 9290, 11260, 18580, 22520, 37160, 523027, 1046054, 2092108, 2615135, 4184216, 5230270, 10460540, 20921080]

約数ペア:

[(1, 20921080), (2, 10460540), (4, 5230270), (5, 4184216), (8, 2615135), (10, 2092108), (20, 1046054), (40, 523027), (563, 37160), (929, 22520), (1126, 18580), (1858, 11260), (2252, 9290), (2815, 7432), (3716, 5630), (4504, 4645)]