20901272

素因数分解:

$2^3\times 7^1\times {\mathrm{251}}^1\times {\mathrm{1487}}^1$

素因数の和:1751

約数の個数: 32

約数和(自身を含む): 44997120

約数和(自身を除く): 24095848

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 251, 502, 1004, 1487, 1757, 2008, 2974, 3514, 5948, 7028, 10409, 11896, 14056, 20818, 41636, 83272, 373237, 746474, 1492948, 2612659, 2985896, 5225318, 10450636, 20901272]

約数ペア:

[(1, 20901272), (2, 10450636), (4, 5225318), (7, 2985896), (8, 2612659), (14, 1492948), (28, 746474), (56, 373237), (251, 83272), (502, 41636), (1004, 20818), (1487, 14056), (1757, 11896), (2008, 10409), (2974, 7028), (3514, 5948)]