21406990

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{194609}}^1$

素因数の和:194627

約数の個数: 16

約数和(自身を含む): 42035760

約数和(自身を除く): 20628770

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 194609, 389218, 973045, 1946090, 2140699, 4281398, 10703495, 21406990]

約数ペア:

[(1, 21406990), (2, 10703495), (5, 4281398), (10, 2140699), (11, 1946090), (22, 973045), (55, 389218), (110, 194609)]