20175813

素因数分解:

$3^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{73}}^1\times {\mathrm{107}}^1$

素因数の和:234

約数の個数: 48

約数和(自身を含む): 34909056

約数和(自身を除く): 14733243

約数列:

[1, 3, 7, 9, 21, 41, 63, 73, 107, 123, 219, 287, 321, 369, 511, 657, 749, 861, 963, 1533, 2247, 2583, 2993, 4387, 4599, 6741, 7811, 8979, 13161, 20951, 23433, 26937, 30709, 39483, 54677, 62853, 70299, 92127, 164031, 188559, 276381, 320251, 492093, 960753, 2241757, 2882259, 6725271, 20175813]

約数ペア:

[(1, 20175813), (3, 6725271), (7, 2882259), (9, 2241757), (21, 960753), (41, 492093), (63, 320251), (73, 276381), (107, 188559), (123, 164031), (219, 92127), (287, 70299), (321, 62853), (369, 54677), (511, 39483), (657, 30709), (749, 26937), (861, 23433), (963, 20951), (1533, 13161), (2247, 8979), (2583, 7811), (2993, 6741), (4387, 4599)]