21218715

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{9623}}^1$

素因数の和:9648

約数の個数: 36

約数和(自身を含む): 42788304

約数和(自身を除く): 21569589

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 49, 63, 105, 147, 245, 315, 441, 735, 2205, 9623, 28869, 48115, 67361, 86607, 144345, 202083, 336805, 433035, 471527, 606249, 1010415, 1414581, 2357635, 3031245, 4243743, 7072905, 21218715]

約数ペア:

[(1, 21218715), (3, 7072905), (5, 4243743), (7, 3031245), (9, 2357635), (15, 1414581), (21, 1010415), (35, 606249), (45, 471527), (49, 433035), (63, 336805), (105, 202083), (147, 144345), (245, 86607), (315, 67361), (441, 48115), (735, 28869), (2205, 9623)]