21225537

素因数分解:

$3^3\times {\mathrm{17}}^1\times {\mathrm{131}}^1\times {\mathrm{353}}^1$

素因数の和:510

約数の個数: 32

約数和(自身を含む): 33644160

約数和(自身を除く): 12418623

約数列:

[1, 3, 9, 17, 27, 51, 131, 153, 353, 393, 459, 1059, 1179, 2227, 3177, 3537, 6001, 6681, 9531, 18003, 20043, 46243, 54009, 60129, 138729, 162027, 416187, 786131, 1248561, 2358393, 7075179, 21225537]

約数ペア:

[(1, 21225537), (3, 7075179), (9, 2358393), (17, 1248561), (27, 786131), (51, 416187), (131, 162027), (153, 138729), (353, 60129), (393, 54009), (459, 46243), (1059, 20043), (1179, 18003), (2227, 9531), (3177, 6681), (3537, 6001)]