21390964

素因数分解:

$2^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{44939}}^1$

素因数の和:44967

約数の個数: 24

約数和(自身を含む): 45299520

約数和(自身を除く): 23908556

約数列:

[1, 2, 4, 7, 14, 17, 28, 34, 68, 119, 238, 476, 44939, 89878, 179756, 314573, 629146, 763963, 1258292, 1527926, 3055852, 5347741, 10695482, 21390964]

約数ペア:

[(1, 21390964), (2, 10695482), (4, 5347741), (7, 3055852), (14, 1527926), (17, 1258292), (28, 763963), (34, 629146), (68, 314573), (119, 179756), (238, 89878), (476, 44939)]