21670960

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{6607}}^1$

素因数の和:6661

約数の個数: 40

約数和(自身を含む): 51621696

約数和(自身を除く): 29950736

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 6607, 13214, 26428, 33035, 52856, 66070, 105712, 132140, 264280, 270887, 528560, 541774, 1083548, 1354435, 2167096, 2708870, 4334192, 5417740, 10835480, 21670960]

約数ペア:

[(1, 21670960), (2, 10835480), (4, 5417740), (5, 4334192), (8, 2708870), (10, 2167096), (16, 1354435), (20, 1083548), (40, 541774), (41, 528560), (80, 270887), (82, 264280), (164, 132140), (205, 105712), (328, 66070), (410, 52856), (656, 33035), (820, 26428), (1640, 13214), (3280, 6607)]