21199540

素因数分解:

$2^2\times 5^1\times {\mathrm{811}}^1\times {\mathrm{1307}}^1$

素因数の和:2127

約数の個数: 24

約数和(自身を含む): 44608032

約数和(自身を除く): 23408492

約数列:

[1, 2, 4, 5, 10, 20, 811, 1307, 1622, 2614, 3244, 4055, 5228, 6535, 8110, 13070, 16220, 26140, 1059977, 2119954, 4239908, 5299885, 10599770, 21199540]

約数ペア:

[(1, 21199540), (2, 10599770), (4, 5299885), (5, 4239908), (10, 2119954), (20, 1059977), (811, 26140), (1307, 16220), (1622, 13070), (2614, 8110), (3244, 6535), (4055, 5228)]