21731465

素因数分解:

$5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{20029}}^1$

素因数の和:20072

約数の個数: 16

約数和(自身を含む): 30766080

約数和(自身を除く): 9034615

約数列:

[1, 5, 7, 31, 35, 155, 217, 1085, 20029, 100145, 140203, 620899, 701015, 3104495, 4346293, 21731465]

約数ペア:

[(1, 21731465), (5, 4346293), (7, 3104495), (31, 701015), (35, 620899), (155, 140203), (217, 100145), (1085, 20029)]