20965240

素因数分解:

$2^3\times 5^1\times {\mathrm{131}}^1\times {\mathrm{4001}}^1$

素因数の和:4143

約数の個数: 32

約数和(自身を含む): 47543760

約数和(自身を除く): 26578520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 131, 262, 524, 655, 1048, 1310, 2620, 4001, 5240, 8002, 16004, 20005, 32008, 40010, 80020, 160040, 524131, 1048262, 2096524, 2620655, 4193048, 5241310, 10482620, 20965240]

約数ペア:

[(1, 20965240), (2, 10482620), (4, 5241310), (5, 4193048), (8, 2620655), (10, 2096524), (20, 1048262), (40, 524131), (131, 160040), (262, 80020), (524, 40010), (655, 32008), (1048, 20005), (1310, 16004), (2620, 8002), (4001, 5240)]