21206020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{2351}}^1$

素因数の和:2412

約数の個数: 48

約数和(自身を含む): 49787136

約数和(自身を除く): 28581116

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 41, 44, 55, 82, 110, 164, 205, 220, 410, 451, 820, 902, 1804, 2255, 2351, 4510, 4702, 9020, 9404, 11755, 23510, 25861, 47020, 51722, 96391, 103444, 129305, 192782, 258610, 385564, 481955, 517220, 963910, 1060301, 1927820, 2120602, 4241204, 5301505, 10603010, 21206020]

約数ペア:

[(1, 21206020), (2, 10603010), (4, 5301505), (5, 4241204), (10, 2120602), (11, 1927820), (20, 1060301), (22, 963910), (41, 517220), (44, 481955), (55, 385564), (82, 258610), (110, 192782), (164, 129305), (205, 103444), (220, 96391), (410, 51722), (451, 47020), (820, 25861), (902, 23510), (1804, 11755), (2255, 9404), (2351, 9020), (4510, 4702)]