21537621

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^2\times {\mathrm{947}}^1$

素因数の和:998

約数の個数: 36

約数和(自身を含む): 37563552

約数和(自身を除く): 16025931

約数列:

[1, 3, 7, 9, 19, 21, 57, 63, 133, 171, 361, 399, 947, 1083, 1197, 2527, 2841, 3249, 6629, 7581, 8523, 17993, 19887, 22743, 53979, 59661, 125951, 161937, 341867, 377853, 1025601, 1133559, 2393069, 3076803, 7179207, 21537621]

約数ペア:

[(1, 21537621), (3, 7179207), (7, 3076803), (9, 2393069), (19, 1133559), (21, 1025601), (57, 377853), (63, 341867), (133, 161937), (171, 125951), (361, 59661), (399, 53979), (947, 22743), (1083, 19887), (1197, 17993), (2527, 8523), (2841, 7581), (3249, 6629)]