21444760

素因数分解:

$2^3\times 5^1\times {\mathrm{97}}^1\times {\mathrm{5527}}^1$

素因数の和:5635

約数の個数: 32

約数和(自身を含む): 48756960

約数和(自身を除く): 27312200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 97, 194, 388, 485, 776, 970, 1940, 3880, 5527, 11054, 22108, 27635, 44216, 55270, 110540, 221080, 536119, 1072238, 2144476, 2680595, 4288952, 5361190, 10722380, 21444760]

約数ペア:

[(1, 21444760), (2, 10722380), (4, 5361190), (5, 4288952), (8, 2680595), (10, 2144476), (20, 1072238), (40, 536119), (97, 221080), (194, 110540), (388, 55270), (485, 44216), (776, 27635), (970, 22108), (1940, 11054), (3880, 5527)]