21997227

素因数分解:

$3^1\times 7^2\times {\mathrm{151}}^1\times {\mathrm{991}}^1$

素因数の和:1159

約数の個数: 24

約数和(自身を含む): 34378752

約数和(自身を除く): 12381525

約数列:

[1, 3, 7, 21, 49, 147, 151, 453, 991, 1057, 2973, 3171, 6937, 7399, 20811, 22197, 48559, 145677, 149641, 448923, 1047487, 3142461, 7332409, 21997227]

約数ペア:

[(1, 21997227), (3, 7332409), (7, 3142461), (21, 1047487), (49, 448923), (147, 149641), (151, 145677), (453, 48559), (991, 22197), (1057, 20811), (2973, 7399), (3171, 6937)]