21730820

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{26501}}^1$

素因数の和:26551

約数の個数: 24

約数和(自身を含む): 46749528

約数和(自身を除く): 25018708

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 26501, 53002, 106004, 132505, 265010, 530020, 1086541, 2173082, 4346164, 5432705, 10865410, 21730820]

約数ペア:

[(1, 21730820), (2, 10865410), (4, 5432705), (5, 4346164), (10, 2173082), (20, 1086541), (41, 530020), (82, 265010), (164, 132505), (205, 106004), (410, 53002), (820, 26501)]