18486980

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1\times {\mathrm{277}}^1$

素因数の和:404

約数の個数: 48

約数和(自身を含む): 40352256

約数和(自身を除く): 21865276

約数列:

[1, 2, 4, 5, 10, 20, 47, 71, 94, 142, 188, 235, 277, 284, 355, 470, 554, 710, 940, 1108, 1385, 1420, 2770, 3337, 5540, 6674, 13019, 13348, 16685, 19667, 26038, 33370, 39334, 52076, 65095, 66740, 78668, 98335, 130190, 196670, 260380, 393340, 924349, 1848698, 3697396, 4621745, 9243490, 18486980]

約数ペア:

[(1, 18486980), (2, 9243490), (4, 4621745), (5, 3697396), (10, 1848698), (20, 924349), (47, 393340), (71, 260380), (94, 196670), (142, 130190), (188, 98335), (235, 78668), (277, 66740), (284, 65095), (355, 52076), (470, 39334), (554, 33370), (710, 26038), (940, 19667), (1108, 16685), (1385, 13348), (1420, 13019), (2770, 6674), (3337, 5540)]