21562155

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{83}}^1\times {\mathrm{251}}^1$

素因数の和:368

約数の個数: 48

約数和(自身を含む): 39626496

約数和(自身を除く): 18064341

約数列:

[1, 3, 5, 9, 15, 23, 45, 69, 83, 115, 207, 249, 251, 345, 415, 747, 753, 1035, 1245, 1255, 1909, 2259, 3735, 3765, 5727, 5773, 9545, 11295, 17181, 17319, 20833, 28635, 28865, 51957, 62499, 85905, 86595, 104165, 187497, 259785, 312495, 479159, 937485, 1437477, 2395795, 4312431, 7187385, 21562155]

約数ペア:

[(1, 21562155), (3, 7187385), (5, 4312431), (9, 2395795), (15, 1437477), (23, 937485), (45, 479159), (69, 312495), (83, 259785), (115, 187497), (207, 104165), (249, 86595), (251, 85905), (345, 62499), (415, 51957), (747, 28865), (753, 28635), (1035, 20833), (1245, 17319), (1255, 17181), (1909, 11295), (2259, 9545), (3735, 5773), (3765, 5727)]