21390170

素因数分解:

$2^1\times 5^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1\times {\mathrm{641}}^1$

素因数の和:766

約数の個数: 32

約数和(自身を含む): 39937536

約数和(自身を除く): 18547366

約数列:

[1, 2, 5, 10, 47, 71, 94, 142, 235, 355, 470, 641, 710, 1282, 3205, 3337, 6410, 6674, 16685, 30127, 33370, 45511, 60254, 91022, 150635, 227555, 301270, 455110, 2139017, 4278034, 10695085, 21390170]

約数ペア:

[(1, 21390170), (2, 10695085), (5, 4278034), (10, 2139017), (47, 455110), (71, 301270), (94, 227555), (142, 150635), (235, 91022), (355, 60254), (470, 45511), (641, 33370), (710, 30127), (1282, 16685), (3205, 6674), (3337, 6410)]