21000451580

素因数分解:

$2^2\times 5^1\times {\mathrm{58631}}^1\times {\mathrm{17909}}^1$

素因数の和:76549

約数の個数: 24

約数和(自身を含む): 44104163040

約数和(自身を除く): 23103711460

約数列:

[1, 2, 4, 5, 10, 20, 17909, 35818, 58631, 71636, 89545, 117262, 179090, 234524, 293155, 358180, 586310, 1172620, 1050022579, 2100045158, 4200090316, 5250112895, 10500225790, 21000451580]

約数ペア:

[(1, 21000451580), (2, 10500225790), (4, 5250112895), (5, 4200090316), (10, 2100045158), (20, 1050022579), (17909, 1172620), (35818, 586310), (58631, 358180), (71636, 293155), (89545, 234524), (117262, 179090)]