199987571

素因数分解:

$7^2\times {\mathrm{151}}^2\times {\mathrm{179}}^1$

素因数の和:495

約数の個数: 18

約数和(自身を含む): 235497780

約数和(自身を除く): 35510209

約数列:

[1, 7, 49, 151, 179, 1057, 1253, 7399, 8771, 22801, 27029, 159607, 189203, 1117249, 1324421, 4081379, 28569653, 199987571]

約数ペア:

[(1, 199987571), (7, 28569653), (49, 4081379), (151, 1324421), (179, 1117249), (1057, 189203), (1253, 159607), (7399, 27029), (8771, 22801)]