21211.0000000

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{1427}}^1$

素因数の和:1489

約数の個数: 32

約数和(自身を含む): 13194720

約数和(自身を除く): 6813176

約数列:

[1, 2, 4, 8, 13, 26, 43, 52, 86, 104, 172, 344, 559, 1118, 1427, 2236, 2854, 4472, 5708, 11416, 18551, 37102, 61361, 74204, 122722, 148408, 245444, 490888, 797693, 1595386, 3190772, 6381544]

約数ペア:

[(1, 6381544), (2, 3190772), (4, 1595386), (8, 797693), (13, 490888), (26, 245444), (43, 148408), (52, 122722), (86, 74204), (104, 61361), (172, 37102), (344, 18551), (559, 11416), (1118, 5708), (1427, 4472), (2236, 2854)]