20402800

素因数分解:

$2^4\times 5^2\times {\mathrm{11}}^1\times {\mathrm{4637}}^1$

素因数の和:4666

約数の個数: 60

約数和(自身を含む): 53485416

約数和(自身を除く): 33082616

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 25, 40, 44, 50, 55, 80, 88, 100, 110, 176, 200, 220, 275, 400, 440, 550, 880, 1100, 2200, 4400, 4637, 9274, 18548, 23185, 37096, 46370, 51007, 74192, 92740, 102014, 115925, 185480, 204028, 231850, 255035, 370960, 408056, 463700, 510070, 816112, 927400, 1020140, 1275175, 1854800, 2040280, 2550350, 4080560, 5100700, 10201400, 20402800]

約数ペア:

[(1, 20402800), (2, 10201400), (4, 5100700), (5, 4080560), (8, 2550350), (10, 2040280), (11, 1854800), (16, 1275175), (20, 1020140), (22, 927400), (25, 816112), (40, 510070), (44, 463700), (50, 408056), (55, 370960), (80, 255035), (88, 231850), (100, 204028), (110, 185480), (176, 115925), (200, 102014), (220, 92740), (275, 74192), (400, 51007), (440, 46370), (550, 37096), (880, 23185), (1100, 18548), (2200, 9274), (4400, 4637)]