21275996

素因数分解:

$2^2\times 7^2\times {\mathrm{73}}^1\times {\mathrm{1487}}^1$

素因数の和:1578

約数の個数: 36

約数和(自身を含む): 43934688

約数和(自身を除く): 22658692

約数列:

[1, 2, 4, 7, 14, 28, 49, 73, 98, 146, 196, 292, 511, 1022, 1487, 2044, 2974, 3577, 5948, 7154, 10409, 14308, 20818, 41636, 72863, 108551, 145726, 217102, 291452, 434204, 759857, 1519714, 3039428, 5318999, 10637998, 21275996]

約数ペア:

[(1, 21275996), (2, 10637998), (4, 5318999), (7, 3039428), (14, 1519714), (28, 759857), (49, 434204), (73, 291452), (98, 217102), (146, 145726), (196, 108551), (292, 72863), (511, 41636), (1022, 20818), (1487, 14308), (2044, 10409), (2974, 7154), (3577, 5948)]