21378198915

素因数分解:

$3^3\times 5^1\times {\mathrm{313}}^1\times {\mathrm{409}}^1\times {\mathrm{1237}}^1$

素因数の和:1973

約数の個数: 64

約数和(自身を含む): 38251228800

約数和(自身を除く): 16873029885

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 313, 409, 939, 1227, 1237, 1565, 2045, 2817, 3681, 3711, 4695, 6135, 6185, 8451, 11043, 11133, 14085, 18405, 18555, 33399, 42255, 55215, 55665, 128017, 166995, 384051, 387181, 505933, 640085, 1152153, 1161543, 1517799, 1920255, 1935905, 2529665, 3456459, 3484629, 4553397, 5760765, 5807715, 7588995, 10453887, 13660191, 17282295, 17423145, 22766985, 52269435, 68300955, 158357029, 475071087, 791785145, 1425213261, 2375355435, 4275639783, 7126066305, 21378198915]

約数ペア:

[(1, 21378198915), (3, 7126066305), (5, 4275639783), (9, 2375355435), (15, 1425213261), (27, 791785145), (45, 475071087), (135, 158357029), (313, 68300955), (409, 52269435), (939, 22766985), (1227, 17423145), (1237, 17282295), (1565, 13660191), (2045, 10453887), (2817, 7588995), (3681, 5807715), (3711, 5760765), (4695, 4553397), (6135, 3484629), (6185, 3456459), (8451, 2529665), (11043, 1935905), (11133, 1920255), (14085, 1517799), (18405, 1161543), (18555, 1152153), (33399, 640085), (42255, 505933), (55215, 387181), (55665, 384051), (128017, 166995)]