21132500

素因数分解:

$2^2\times 5^4\times {\mathrm{79}}^1\times {\mathrm{107}}^1$

素因数の和:210

約数の個数: 60

約数和(自身を含む): 47234880

約数和(自身を除く): 26102380

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 79, 100, 107, 125, 158, 214, 250, 316, 395, 428, 500, 535, 625, 790, 1070, 1250, 1580, 1975, 2140, 2500, 2675, 3950, 5350, 7900, 8453, 9875, 10700, 13375, 16906, 19750, 26750, 33812, 39500, 42265, 49375, 53500, 66875, 84530, 98750, 133750, 169060, 197500, 211325, 267500, 422650, 845300, 1056625, 2113250, 4226500, 5283125, 10566250, 21132500]

約数ペア:

[(1, 21132500), (2, 10566250), (4, 5283125), (5, 4226500), (10, 2113250), (20, 1056625), (25, 845300), (50, 422650), (79, 267500), (100, 211325), (107, 197500), (125, 169060), (158, 133750), (214, 98750), (250, 84530), (316, 66875), (395, 53500), (428, 49375), (500, 42265), (535, 39500), (625, 33812), (790, 26750), (1070, 19750), (1250, 16906), (1580, 13375), (1975, 10700), (2140, 9875), (2500, 8453), (2675, 7900), (3950, 5350)]