18989780

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^2\times {\mathrm{1129}}^1$

素因数の和:1196

約数の個数: 36

約数和(自身を含む): 41337660

約数和(自身を除く): 22347880

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 116, 145, 290, 580, 841, 1129, 1682, 2258, 3364, 4205, 4516, 5645, 8410, 11290, 16820, 22580, 32741, 65482, 130964, 163705, 327410, 654820, 949489, 1898978, 3797956, 4747445, 9494890, 18989780]

約数ペア:

[(1, 18989780), (2, 9494890), (4, 4747445), (5, 3797956), (10, 1898978), (20, 949489), (29, 654820), (58, 327410), (116, 163705), (145, 130964), (290, 65482), (580, 32741), (841, 22580), (1129, 16820), (1682, 11290), (2258, 8410), (3364, 5645), (4205, 4516)]