20557515

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{5417}}^1$

素因数の和:5459

約数の個数: 32

約数和(自身を含む): 37449216

約数和(自身を除く): 16891701

約数列:

[1, 3, 5, 11, 15, 23, 33, 55, 69, 115, 165, 253, 345, 759, 1265, 3795, 5417, 16251, 27085, 59587, 81255, 124591, 178761, 297935, 373773, 622955, 893805, 1370501, 1868865, 4111503, 6852505, 20557515]

約数ペア:

[(1, 20557515), (3, 6852505), (5, 4111503), (11, 1868865), (15, 1370501), (23, 893805), (33, 622955), (55, 373773), (69, 297935), (115, 178761), (165, 124591), (253, 81255), (345, 59587), (759, 27085), (1265, 16251), (3795, 5417)]