25551640

素因数分解:

$2^3\times 5^1\times {\mathrm{491}}^1\times {\mathrm{1301}}^1$

素因数の和:1803

約数の個数: 32

約数和(自身を含む): 57652560

約数和(自身を除く): 32100920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 491, 982, 1301, 1964, 2455, 2602, 3928, 4910, 5204, 6505, 9820, 10408, 13010, 19640, 26020, 52040, 638791, 1277582, 2555164, 3193955, 5110328, 6387910, 12775820, 25551640]

約数ペア:

[(1, 25551640), (2, 12775820), (4, 6387910), (5, 5110328), (8, 3193955), (10, 2555164), (20, 1277582), (40, 638791), (491, 52040), (982, 26020), (1301, 19640), (1964, 13010), (2455, 10408), (2602, 9820), (3928, 6505), (4910, 5204)]