20440240

素因数分解:

$2^4\times 5^1\times {\mathrm{255503}}^1$

素因数の和:255516

約数の個数: 20

約数和(自身を含む): 47523744

約数和(自身を除く): 27083504

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 255503, 511006, 1022012, 1277515, 2044024, 2555030, 4088048, 5110060, 10220120, 20440240]

約数ペア:

[(1, 20440240), (2, 10220120), (4, 5110060), (5, 4088048), (8, 2555030), (10, 2044024), (16, 1277515), (20, 1022012), (40, 511006), (80, 255503)]