21327615

素因数分解:

$3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{59}}^1\times {\mathrm{277}}^1$

素因数の和:376

約数の個数: 48

約数和(自身を含む): 39031200

約数和(自身を除く): 17703585

約数列:

[1, 3, 5, 9, 15, 29, 45, 59, 87, 145, 177, 261, 277, 295, 435, 531, 831, 885, 1305, 1385, 1711, 2493, 2655, 4155, 5133, 8033, 8555, 12465, 15399, 16343, 24099, 25665, 40165, 49029, 72297, 76995, 81715, 120495, 147087, 245145, 361485, 473947, 735435, 1421841, 2369735, 4265523, 7109205, 21327615]

約数ペア:

[(1, 21327615), (3, 7109205), (5, 4265523), (9, 2369735), (15, 1421841), (29, 735435), (45, 473947), (59, 361485), (87, 245145), (145, 147087), (177, 120495), (261, 81715), (277, 76995), (295, 72297), (435, 49029), (531, 40165), (831, 25665), (885, 24099), (1305, 16343), (1385, 15399), (1711, 12465), (2493, 8555), (2655, 8033), (4155, 5133)]