18777940

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^2\times {\mathrm{977}}^1$

素因数の和:1048

約数の個数: 36

約数和(自身を含む): 40788468

約数和(自身を除く): 22010528

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 961, 977, 1922, 1954, 3844, 3908, 4805, 4885, 9610, 9770, 19220, 19540, 30287, 60574, 121148, 151435, 302870, 605740, 938897, 1877794, 3755588, 4694485, 9388970, 18777940]

約数ペア:

[(1, 18777940), (2, 9388970), (4, 4694485), (5, 3755588), (10, 1877794), (20, 938897), (31, 605740), (62, 302870), (124, 151435), (155, 121148), (310, 60574), (620, 30287), (961, 19540), (977, 19220), (1922, 9770), (1954, 9610), (3844, 4885), (3908, 4805)]