21322725

素因数分解:

$3^1\times 5^2\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{263}}^1$

素因数の和:346

約数の個数: 48

約数和(自身を含む): 37711872

約数和(自身を除く): 16389147

約数列:

[1, 3, 5, 15, 23, 25, 47, 69, 75, 115, 141, 235, 263, 345, 575, 705, 789, 1081, 1175, 1315, 1725, 3243, 3525, 3945, 5405, 6049, 6575, 12361, 16215, 18147, 19725, 27025, 30245, 37083, 61805, 81075, 90735, 151225, 185415, 284303, 309025, 453675, 852909, 927075, 1421515, 4264545, 7107575, 21322725]

約数ペア:

[(1, 21322725), (3, 7107575), (5, 4264545), (15, 1421515), (23, 927075), (25, 852909), (47, 453675), (69, 309025), (75, 284303), (115, 185415), (141, 151225), (235, 90735), (263, 81075), (345, 61805), (575, 37083), (705, 30245), (789, 27025), (1081, 19725), (1175, 18147), (1315, 16215), (1725, 12361), (3243, 6575), (3525, 6049), (3945, 5405)]