21250760

素因数分解:

$2^3\times 5^1\times {\mathrm{97}}^1\times {\mathrm{5477}}^1$

素因数の和:5585

約数の個数: 32

約数和(自身を含む): 48315960

約数和(自身を除く): 27065200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 97, 194, 388, 485, 776, 970, 1940, 3880, 5477, 10954, 21908, 27385, 43816, 54770, 109540, 219080, 531269, 1062538, 2125076, 2656345, 4250152, 5312690, 10625380, 21250760]

約数ペア:

[(1, 21250760), (2, 10625380), (4, 5312690), (5, 4250152), (8, 2656345), (10, 2125076), (20, 1062538), (40, 531269), (97, 219080), (194, 109540), (388, 54770), (485, 43816), (776, 27385), (970, 21908), (1940, 10954), (3880, 5477)]