21291040

素因数分解:

$2^5\times 5^1\times {\mathrm{133069}}^1$

素因数の和:133084

約数の個数: 24

約数和(自身を含む): 50300460

約数和(自身を除く): 29009420

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 133069, 266138, 532276, 665345, 1064552, 1330690, 2129104, 2661380, 4258208, 5322760, 10645520, 21291040]

約数ペア:

[(1, 21291040), (2, 10645520), (4, 5322760), (5, 4258208), (8, 2661380), (10, 2129104), (16, 1330690), (20, 1064552), (32, 665345), (40, 532276), (80, 266138), (160, 133069)]