20640015

素因数分解:

$3^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{113}}^1$

素因数の和:182

約数の個数: 80

約数和(自身を含む): 41713056

約数和(自身を除く): 21073041

約数列:

[1, 3, 5, 9, 11, 15, 27, 33, 41, 45, 55, 81, 99, 113, 123, 135, 165, 205, 297, 339, 369, 405, 451, 495, 565, 615, 891, 1017, 1107, 1243, 1353, 1485, 1695, 1845, 2255, 3051, 3321, 3729, 4059, 4455, 4633, 5085, 5535, 6215, 6765, 9153, 11187, 12177, 13899, 15255, 16605, 18645, 20295, 23165, 33561, 36531, 41697, 45765, 50963, 55935, 60885, 69495, 100683, 125091, 152889, 167805, 182655, 208485, 254815, 375273, 458667, 503415, 625455, 764445, 1376001, 1876365, 2293335, 4128003, 6880005, 20640015]

約数ペア:

[(1, 20640015), (3, 6880005), (5, 4128003), (9, 2293335), (11, 1876365), (15, 1376001), (27, 764445), (33, 625455), (41, 503415), (45, 458667), (55, 375273), (81, 254815), (99, 208485), (113, 182655), (123, 167805), (135, 152889), (165, 125091), (205, 100683), (297, 69495), (339, 60885), (369, 55935), (405, 50963), (451, 45765), (495, 41697), (565, 36531), (615, 33561), (891, 23165), (1017, 20295), (1107, 18645), (1243, 16605), (1353, 15255), (1485, 13899), (1695, 12177), (1845, 11187), (2255, 9153), (3051, 6765), (3321, 6215), (3729, 5535), (4059, 5085), (4455, 4633)]