638654751

素因数分解:

$3^2\times 7^1\times {\mathrm{1097}}^1\times {\mathrm{9241}}^1$

素因数の和:10351

約数の個数: 24

約数和(自身を含む): 1055362464

約数和(自身を除く): 416707713

約数列:

[1, 3, 7, 9, 21, 63, 1097, 3291, 7679, 9241, 9873, 23037, 27723, 64687, 69111, 83169, 194061, 582183, 10137377, 30412131, 70961639, 91236393, 212884917, 638654751]

約数ペア:

[(1, 638654751), (3, 212884917), (7, 91236393), (9, 70961639), (21, 30412131), (63, 10137377), (1097, 582183), (3291, 194061), (7679, 83169), (9241, 69111), (9873, 64687), (23037, 27723)]