21318765

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{109}}^1$

素因数の和:206

約数の個数: 64

約数和(自身を含む): 39916800

約数和(自身を除く): 18598035

約数列:

[1, 3, 5, 13, 15, 17, 39, 51, 59, 65, 85, 109, 177, 195, 221, 255, 295, 327, 545, 663, 767, 885, 1003, 1105, 1417, 1635, 1853, 2301, 3009, 3315, 3835, 4251, 5015, 5559, 6431, 7085, 9265, 11505, 13039, 15045, 19293, 21255, 24089, 27795, 32155, 39117, 65195, 72267, 83603, 96465, 109327, 120445, 195585, 250809, 327981, 361335, 418015, 546635, 1254045, 1421251, 1639905, 4263753, 7106255, 21318765]

約数ペア:

[(1, 21318765), (3, 7106255), (5, 4263753), (13, 1639905), (15, 1421251), (17, 1254045), (39, 546635), (51, 418015), (59, 361335), (65, 327981), (85, 250809), (109, 195585), (177, 120445), (195, 109327), (221, 96465), (255, 83603), (295, 72267), (327, 65195), (545, 39117), (663, 32155), (767, 27795), (885, 24089), (1003, 21255), (1105, 19293), (1417, 15045), (1635, 13039), (1853, 11505), (2301, 9265), (3009, 7085), (3315, 6431), (3835, 5559), (4251, 5015)]