20981438

素因数分解:

$2^1\times {\mathrm{61}}^1\times {\mathrm{229}}^1\times {\mathrm{751}}^1$

素因数の和:1043

約数の個数: 16

約数和(自身を含む): 32170560

約数和(自身を除く): 11189122

約数列:

[1, 2, 61, 122, 229, 458, 751, 1502, 13969, 27938, 45811, 91622, 171979, 343958, 10490719, 20981438]

約数ペア:

[(1, 20981438), (2, 10490719), (61, 343958), (122, 171979), (229, 91622), (458, 45811), (751, 27938), (1502, 13969)]