20501845

素因数分解:

$5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{157}}^1$

素因数の和:230

約数の個数: 48

約数和(自身を含む): 31773168

約数和(自身を除く): 11271323

約数列:

[1, 5, 7, 13, 35, 41, 49, 65, 91, 157, 205, 245, 287, 455, 533, 637, 785, 1099, 1435, 2009, 2041, 2665, 3185, 3731, 5495, 6437, 7693, 10045, 10205, 14287, 18655, 26117, 32185, 38465, 45059, 71435, 83681, 100009, 130585, 225295, 315413, 418405, 500045, 585767, 1577065, 2928835, 4100369, 20501845]

約数ペア:

[(1, 20501845), (5, 4100369), (7, 2928835), (13, 1577065), (35, 585767), (41, 500045), (49, 418405), (65, 315413), (91, 225295), (157, 130585), (205, 100009), (245, 83681), (287, 71435), (455, 45059), (533, 38465), (637, 32185), (785, 26117), (1099, 18655), (1435, 14287), (2009, 10205), (2041, 10045), (2665, 7693), (3185, 6437), (3731, 5495)]