21336920

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{683}}^1$

素因数の和:776

約数の個数: 64

約数和(自身を含む): 53187840

約数和(自身を除く): 31850920

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 71, 88, 110, 142, 220, 284, 355, 440, 568, 683, 710, 781, 1366, 1420, 1562, 2732, 2840, 3124, 3415, 3905, 5464, 6248, 6830, 7513, 7810, 13660, 15026, 15620, 27320, 30052, 31240, 37565, 48493, 60104, 75130, 96986, 150260, 193972, 242465, 300520, 387944, 484930, 533423, 969860, 1066846, 1939720, 2133692, 2667115, 4267384, 5334230, 10668460, 21336920]

約数ペア:

[(1, 21336920), (2, 10668460), (4, 5334230), (5, 4267384), (8, 2667115), (10, 2133692), (11, 1939720), (20, 1066846), (22, 969860), (40, 533423), (44, 484930), (55, 387944), (71, 300520), (88, 242465), (110, 193972), (142, 150260), (220, 96986), (284, 75130), (355, 60104), (440, 48493), (568, 37565), (683, 31240), (710, 30052), (781, 27320), (1366, 15620), (1420, 15026), (1562, 13660), (2732, 7810), (2840, 7513), (3124, 6830), (3415, 6248), (3905, 5464)]