640611

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{79}}^1$

素因数の和:155

約数の個数: 24

約数和(自身を含む): 1010880

約数和(自身を除く): 370269

約数列:

[1, 3, 9, 17, 51, 53, 79, 153, 159, 237, 477, 711, 901, 1343, 2703, 4029, 4187, 8109, 12087, 12561, 37683, 71179, 213537, 640611]

約数ペア:

[(1, 640611), (3, 213537), (9, 71179), (17, 37683), (51, 12561), (53, 12087), (79, 8109), (153, 4187), (159, 4029), (237, 2703), (477, 1343), (711, 901)]