20702745

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{41}}^1\times {\mathrm{229}}^1$

素因数の和:295

約数の個数: 72

約数和(自身を含む): 42948360

約数和(自身を除く): 22245615

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 41, 45, 49, 63, 105, 123, 147, 205, 229, 245, 287, 315, 369, 441, 615, 687, 735, 861, 1145, 1435, 1603, 1845, 2009, 2061, 2205, 2583, 3435, 4305, 4809, 6027, 8015, 9389, 10045, 10305, 11221, 12915, 14427, 18081, 24045, 28167, 30135, 33663, 46945, 56105, 65723, 72135, 84501, 90405, 100989, 140835, 168315, 197169, 328615, 422505, 460061, 504945, 591507, 985845, 1380183, 2300305, 2957535, 4140549, 6900915, 20702745]

約数ペア:

[(1, 20702745), (3, 6900915), (5, 4140549), (7, 2957535), (9, 2300305), (15, 1380183), (21, 985845), (35, 591507), (41, 504945), (45, 460061), (49, 422505), (63, 328615), (105, 197169), (123, 168315), (147, 140835), (205, 100989), (229, 90405), (245, 84501), (287, 72135), (315, 65723), (369, 56105), (441, 46945), (615, 33663), (687, 30135), (735, 28167), (861, 24045), (1145, 18081), (1435, 14427), (1603, 12915), (1845, 11221), (2009, 10305), (2061, 10045), (2205, 9389), (2583, 8015), (3435, 6027), (4305, 4809)]