21496528

素因数分解:

$2^4\times {\mathrm{71}}^1\times {\mathrm{127}}^1\times {\mathrm{149}}^1$

素因数の和:355

約数の個数: 40

約数和(自身を含む): 42854400

約数和(自身を除く): 21357872

約数列:

[1, 2, 4, 8, 16, 71, 127, 142, 149, 254, 284, 298, 508, 568, 596, 1016, 1136, 1192, 2032, 2384, 9017, 10579, 18034, 18923, 21158, 36068, 37846, 42316, 72136, 75692, 84632, 144272, 151384, 169264, 302768, 1343533, 2687066, 5374132, 10748264, 21496528]

約数ペア:

[(1, 21496528), (2, 10748264), (4, 5374132), (8, 2687066), (16, 1343533), (71, 302768), (127, 169264), (142, 151384), (149, 144272), (254, 84632), (284, 75692), (298, 72136), (508, 42316), (568, 37846), (596, 36068), (1016, 21158), (1136, 18923), (1192, 18034), (2032, 10579), (2384, 9017)]