21388167

素因数分解:

$3^2\times {\mathrm{19}}^2\times {\mathrm{29}}^1\times {\mathrm{227}}^1$

素因数の和:300

約数の個数: 36

約数和(自身を含む): 33878520

約数和(自身を除く): 12490353

約数列:

[1, 3, 9, 19, 29, 57, 87, 171, 227, 261, 361, 551, 681, 1083, 1653, 2043, 3249, 4313, 4959, 6583, 10469, 12939, 19749, 31407, 38817, 59247, 81947, 94221, 125077, 245841, 375231, 737523, 1125693, 2376463, 7129389, 21388167]

約数ペア:

[(1, 21388167), (3, 7129389), (9, 2376463), (19, 1125693), (29, 737523), (57, 375231), (87, 245841), (171, 125077), (227, 94221), (261, 81947), (361, 59247), (551, 38817), (681, 31407), (1083, 19749), (1653, 12939), (2043, 10469), (3249, 6583), (4313, 4959)]