21668560

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{6299}}^1$

素因数の和:6355

約数の個数: 40

約数和(自身を含む): 51559200

約数和(自身を除く): 29890640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 172, 215, 344, 430, 688, 860, 1720, 3440, 6299, 12598, 25196, 31495, 50392, 62990, 100784, 125980, 251960, 270857, 503920, 541714, 1083428, 1354285, 2166856, 2708570, 4333712, 5417140, 10834280, 21668560]

約数ペア:

[(1, 21668560), (2, 10834280), (4, 5417140), (5, 4333712), (8, 2708570), (10, 2166856), (16, 1354285), (20, 1083428), (40, 541714), (43, 503920), (80, 270857), (86, 251960), (172, 125980), (215, 100784), (344, 62990), (430, 50392), (688, 31495), (860, 25196), (1720, 12598), (3440, 6299)]