21444940

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{107}}^1\times {\mathrm{911}}^1$

素因数の和:1038

約数の個数: 48

約数和(自身を含む): 49641984

約数和(自身を除く): 28197044

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 107, 110, 214, 220, 428, 535, 911, 1070, 1177, 1822, 2140, 2354, 3644, 4555, 4708, 5885, 9110, 10021, 11770, 18220, 20042, 23540, 40084, 50105, 97477, 100210, 194954, 200420, 389908, 487385, 974770, 1072247, 1949540, 2144494, 4288988, 5361235, 10722470, 21444940]

約数ペア:

[(1, 21444940), (2, 10722470), (4, 5361235), (5, 4288988), (10, 2144494), (11, 1949540), (20, 1072247), (22, 974770), (44, 487385), (55, 389908), (107, 200420), (110, 194954), (214, 100210), (220, 97477), (428, 50105), (535, 40084), (911, 23540), (1070, 20042), (1177, 18220), (1822, 11770), (2140, 10021), (2354, 9110), (3644, 5885), (4555, 4708)]