21150280

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{18233}}^1$

素因数の和:18273

約数の個数: 32

約数和(自身を含む): 49231800

約数和(自身を除く): 28081520

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 116, 145, 232, 290, 580, 1160, 18233, 36466, 72932, 91165, 145864, 182330, 364660, 528757, 729320, 1057514, 2115028, 2643785, 4230056, 5287570, 10575140, 21150280]

約数ペア:

[(1, 21150280), (2, 10575140), (4, 5287570), (5, 4230056), (8, 2643785), (10, 2115028), (20, 1057514), (29, 729320), (40, 528757), (58, 364660), (116, 182330), (145, 145864), (232, 91165), (290, 72932), (580, 36466), (1160, 18233)]