21404955

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{587}}^1$

素因数の和:636

約数の個数: 64

約数和(自身を含む): 42674688

約数和(自身を除く): 21269733

約数列:

[1, 3, 5, 11, 13, 15, 17, 33, 39, 51, 55, 65, 85, 143, 165, 187, 195, 221, 255, 429, 561, 587, 663, 715, 935, 1105, 1761, 2145, 2431, 2805, 2935, 3315, 6457, 7293, 7631, 8805, 9979, 12155, 19371, 22893, 29937, 32285, 36465, 38155, 49895, 83941, 96855, 109769, 114465, 129727, 149685, 251823, 329307, 389181, 419705, 548845, 648635, 1259115, 1426997, 1646535, 1945905, 4280991, 7134985, 21404955]

約数ペア:

[(1, 21404955), (3, 7134985), (5, 4280991), (11, 1945905), (13, 1646535), (15, 1426997), (17, 1259115), (33, 648635), (39, 548845), (51, 419705), (55, 389181), (65, 329307), (85, 251823), (143, 149685), (165, 129727), (187, 114465), (195, 109769), (221, 96855), (255, 83941), (429, 49895), (561, 38155), (587, 36465), (663, 32285), (715, 29937), (935, 22893), (1105, 19371), (1761, 12155), (2145, 9979), (2431, 8805), (2805, 7631), (2935, 7293), (3315, 6457)]