21547539

素因数分解:

$3^5\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{359}}^1$

素因数の和:406

約数の個数: 48

約数和(自身を含む): 36691200

約数和(自身を除く): 15143661

約数列:

[1, 3, 9, 13, 19, 27, 39, 57, 81, 117, 171, 243, 247, 351, 359, 513, 741, 1053, 1077, 1539, 2223, 3159, 3231, 4617, 4667, 6669, 6821, 9693, 14001, 20007, 20463, 29079, 42003, 60021, 61389, 87237, 88673, 126009, 184167, 266019, 378027, 552501, 798057, 1134081, 1657503, 2394171, 7182513, 21547539]

約数ペア:

[(1, 21547539), (3, 7182513), (9, 2394171), (13, 1657503), (19, 1134081), (27, 798057), (39, 552501), (57, 378027), (81, 266019), (117, 184167), (171, 126009), (243, 88673), (247, 87237), (351, 61389), (359, 60021), (513, 42003), (741, 29079), (1053, 20463), (1077, 20007), (1539, 14001), (2223, 9693), (3159, 6821), (3231, 6669), (4617, 4667)]