21420245

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{59}}^1$

素因数の和:146

約数の個数: 64

約数和(自身を含む): 34836480

約数和(自身を除く): 13416235

約数列:

[1, 5, 7, 11, 23, 35, 41, 55, 59, 77, 115, 161, 205, 253, 287, 295, 385, 413, 451, 649, 805, 943, 1265, 1357, 1435, 1771, 2065, 2255, 2419, 3157, 3245, 4543, 4715, 6601, 6785, 8855, 9499, 10373, 12095, 14927, 15785, 16933, 22715, 26609, 33005, 47495, 51865, 55637, 72611, 74635, 84665, 104489, 133045, 186263, 278185, 363055, 389459, 522445, 612007, 931315, 1947295, 3060035, 4284049, 21420245]

約数ペア:

[(1, 21420245), (5, 4284049), (7, 3060035), (11, 1947295), (23, 931315), (35, 612007), (41, 522445), (55, 389459), (59, 363055), (77, 278185), (115, 186263), (161, 133045), (205, 104489), (253, 84665), (287, 74635), (295, 72611), (385, 55637), (413, 51865), (451, 47495), (649, 33005), (805, 26609), (943, 22715), (1265, 16933), (1357, 15785), (1435, 14927), (1771, 12095), (2065, 10373), (2255, 9499), (2419, 8855), (3157, 6785), (3245, 6601), (4543, 4715)]