19978900

素因数分解:

$2^2\times 5^2\times {\mathrm{241}}^1\times {\mathrm{829}}^1$

素因数の和:1084

約数の個数: 36

約数和(自身を含む): 43586620

約数和(自身を除く): 23607720

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 241, 482, 829, 964, 1205, 1658, 2410, 3316, 4145, 4820, 6025, 8290, 12050, 16580, 20725, 24100, 41450, 82900, 199789, 399578, 799156, 998945, 1997890, 3995780, 4994725, 9989450, 19978900]

約数ペア:

[(1, 19978900), (2, 9989450), (4, 4994725), (5, 3995780), (10, 1997890), (20, 998945), (25, 799156), (50, 399578), (100, 199789), (241, 82900), (482, 41450), (829, 24100), (964, 20725), (1205, 16580), (1658, 12050), (2410, 8290), (3316, 6025), (4145, 4820)]