21504128

素因数分解:

$2^7\times {\mathrm{43}}^1\times {\mathrm{3907}}^1$

素因数の和:3964

約数の個数: 32

約数和(自身を含む): 43847760

約数和(自身を除く): 22343632

約数列:

[1, 2, 4, 8, 16, 32, 43, 64, 86, 128, 172, 344, 688, 1376, 2752, 3907, 5504, 7814, 15628, 31256, 62512, 125024, 168001, 250048, 336002, 500096, 672004, 1344008, 2688016, 5376032, 10752064, 21504128]

約数ペア:

[(1, 21504128), (2, 10752064), (4, 5376032), (8, 2688016), (16, 1344008), (32, 672004), (43, 500096), (64, 336002), (86, 250048), (128, 168001), (172, 125024), (344, 62512), (688, 31256), (1376, 15628), (2752, 7814), (3907, 5504)]