21115784

素因数分解:

$2^3\times {\mathrm{47}}^1\times {\mathrm{89}}^1\times {\mathrm{631}}^1$

素因数の和:773

約数の個数: 32

約数和(自身を含む): 40953600

約数和(自身を除く): 19837816

約数列:

[1, 2, 4, 8, 47, 89, 94, 178, 188, 356, 376, 631, 712, 1262, 2524, 4183, 5048, 8366, 16732, 29657, 33464, 56159, 59314, 112318, 118628, 224636, 237256, 449272, 2639473, 5278946, 10557892, 21115784]

約数ペア:

[(1, 21115784), (2, 10557892), (4, 5278946), (8, 2639473), (47, 449272), (89, 237256), (94, 224636), (178, 118628), (188, 112318), (356, 59314), (376, 56159), (631, 33464), (712, 29657), (1262, 16732), (2524, 8366), (4183, 5048)]