21491890

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{1907}}^1$

素因数の和:1951

約数の個数: 48

約数和(自身を含む): 46982592

約数和(自身を除く): 25490702

約数列:

[1, 2, 5, 7, 10, 14, 23, 35, 46, 49, 70, 98, 115, 161, 230, 245, 322, 490, 805, 1127, 1610, 1907, 2254, 3814, 5635, 9535, 11270, 13349, 19070, 26698, 43861, 66745, 87722, 93443, 133490, 186886, 219305, 307027, 438610, 467215, 614054, 934430, 1535135, 2149189, 3070270, 4298378, 10745945, 21491890]

約数ペア:

[(1, 21491890), (2, 10745945), (5, 4298378), (7, 3070270), (10, 2149189), (14, 1535135), (23, 934430), (35, 614054), (46, 467215), (49, 438610), (70, 307027), (98, 219305), (115, 186886), (161, 133490), (230, 93443), (245, 87722), (322, 66745), (490, 43861), (805, 26698), (1127, 19070), (1610, 13349), (1907, 11270), (2254, 9535), (3814, 5635)]