19901255

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{487}}^1\times {\mathrm{743}}^1$

素因数の和:1246

約数の個数: 16

約数和(自身を含む): 26141184

約数和(自身を除く): 6239929

約数列:

[1, 5, 11, 55, 487, 743, 2435, 3715, 5357, 8173, 26785, 40865, 361841, 1809205, 3980251, 19901255]

約数ペア:

[(1, 19901255), (5, 3980251), (11, 1809205), (55, 361841), (487, 40865), (743, 26785), (2435, 8173), (3715, 5357)]