21072880

素因数分解:

$2^4\times 5^1\times {\mathrm{263411}}^1$

素因数の和:263424

約数の個数: 20

約数和(自身を含む): 48994632

約数和(自身を除く): 27921752

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 263411, 526822, 1053644, 1317055, 2107288, 2634110, 4214576, 5268220, 10536440, 21072880]

約数ペア:

[(1, 21072880), (2, 10536440), (4, 5268220), (5, 4214576), (8, 2634110), (10, 2107288), (16, 1317055), (20, 1053644), (40, 526822), (80, 263411)]