20180812

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{2027}}^1$

素因数の和:2181

約数の個数: 24

約数和(自身を含む): 37477440

約数和(自身を除く): 17296628

約数列:

[1, 2, 4, 19, 38, 76, 131, 262, 524, 2027, 2489, 4054, 4978, 8108, 9956, 38513, 77026, 154052, 265537, 531074, 1062148, 5045203, 10090406, 20180812]

約数ペア:

[(1, 20180812), (2, 10090406), (4, 5045203), (19, 1062148), (38, 531074), (76, 265537), (131, 154052), (262, 77026), (524, 38513), (2027, 9956), (2489, 8108), (4054, 4978)]