28269891

素因数分解:

$3^6\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{157}}^1$

素因数の和:207

約数の個数: 56

約数和(自身を含む): 48354320

約数和(自身を除く): 20084429

約数列:

[1, 3, 9, 13, 19, 27, 39, 57, 81, 117, 157, 171, 243, 247, 351, 471, 513, 729, 741, 1053, 1413, 1539, 2041, 2223, 2983, 3159, 4239, 4617, 6123, 6669, 8949, 9477, 12717, 13851, 18369, 20007, 26847, 38151, 38779, 55107, 60021, 80541, 114453, 116337, 165321, 180063, 241623, 349011, 495963, 724869, 1047033, 1487889, 2174607, 3141099, 9423297, 28269891]

約数ペア:

[(1, 28269891), (3, 9423297), (9, 3141099), (13, 2174607), (19, 1487889), (27, 1047033), (39, 724869), (57, 495963), (81, 349011), (117, 241623), (157, 180063), (171, 165321), (243, 116337), (247, 114453), (351, 80541), (471, 60021), (513, 55107), (729, 38779), (741, 38151), (1053, 26847), (1413, 20007), (1539, 18369), (2041, 13851), (2223, 12717), (2983, 9477), (3159, 8949), (4239, 6669), (4617, 6123)]