1988500

素因数分解:

$2^2\times 5^3\times {\mathrm{41}}^1\times {\mathrm{97}}^1$

素因数の和:157

約数の個数: 48

約数和(自身を含む): 4494672

約数和(自身を除く): 2506172

約数列:

[1, 2, 4, 5, 10, 20, 25, 41, 50, 82, 97, 100, 125, 164, 194, 205, 250, 388, 410, 485, 500, 820, 970, 1025, 1940, 2050, 2425, 3977, 4100, 4850, 5125, 7954, 9700, 10250, 12125, 15908, 19885, 20500, 24250, 39770, 48500, 79540, 99425, 198850, 397700, 497125, 994250, 1988500]

約数ペア:

[(1, 1988500), (2, 994250), (4, 497125), (5, 397700), (10, 198850), (20, 99425), (25, 79540), (41, 48500), (50, 39770), (82, 24250), (97, 20500), (100, 19885), (125, 15908), (164, 12125), (194, 10250), (205, 9700), (250, 7954), (388, 5125), (410, 4850), (485, 4100), (500, 3977), (820, 2425), (970, 2050), (1025, 1940)]