20531984

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{2713}}^1$

素因数の和:2775

約数の個数: 40

約数和(自身を含む): 44422752

約数和(自身を除く): 23890768

約数列:

[1, 2, 4, 8, 11, 16, 22, 43, 44, 86, 88, 172, 176, 344, 473, 688, 946, 1892, 2713, 3784, 5426, 7568, 10852, 21704, 29843, 43408, 59686, 116659, 119372, 233318, 238744, 466636, 477488, 933272, 1283249, 1866544, 2566498, 5132996, 10265992, 20531984]

約数ペア:

[(1, 20531984), (2, 10265992), (4, 5132996), (8, 2566498), (11, 1866544), (16, 1283249), (22, 933272), (43, 477488), (44, 466636), (86, 238744), (88, 233318), (172, 119372), (176, 116659), (344, 59686), (473, 43408), (688, 29843), (946, 21704), (1892, 10852), (2713, 7568), (3784, 5426)]