20005280

素因数分解:

$2^5\times 5^1\times {\mathrm{97}}^1\times {\mathrm{1289}}^1$

素因数の和:1401

約数の個数: 48

約数和(自身を含む): 47786760

約数和(自身を除く): 27781480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 97, 160, 194, 388, 485, 776, 970, 1289, 1552, 1940, 2578, 3104, 3880, 5156, 6445, 7760, 10312, 12890, 15520, 20624, 25780, 41248, 51560, 103120, 125033, 206240, 250066, 500132, 625165, 1000264, 1250330, 2000528, 2500660, 4001056, 5001320, 10002640, 20005280]

約数ペア:

[(1, 20005280), (2, 10002640), (4, 5001320), (5, 4001056), (8, 2500660), (10, 2000528), (16, 1250330), (20, 1000264), (32, 625165), (40, 500132), (80, 250066), (97, 206240), (160, 125033), (194, 103120), (388, 51560), (485, 41248), (776, 25780), (970, 20624), (1289, 15520), (1552, 12890), (1940, 10312), (2578, 7760), (3104, 6445), (3880, 5156)]