21243100

素因数分解:

$2^2\times 5^2\times {\mathrm{79}}^1\times {\mathrm{2689}}^1$

素因数の和:2782

約数の個数: 36

約数和(自身を含む): 46698400

約数和(自身を除く): 25455300

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 79, 100, 158, 316, 395, 790, 1580, 1975, 2689, 3950, 5378, 7900, 10756, 13445, 26890, 53780, 67225, 134450, 212431, 268900, 424862, 849724, 1062155, 2124310, 4248620, 5310775, 10621550, 21243100]

約数ペア:

[(1, 21243100), (2, 10621550), (4, 5310775), (5, 4248620), (10, 2124310), (20, 1062155), (25, 849724), (50, 424862), (79, 268900), (100, 212431), (158, 134450), (316, 67225), (395, 53780), (790, 26890), (1580, 13445), (1975, 10756), (2689, 7900), (3950, 5378)]