64321240

素因数分解:

$2^3\times 5^1\times {\mathrm{211}}^1\times {\mathrm{7621}}^1$

素因数の和:7843

約数の個数: 32

約数和(自身を含む): 145427760

約数和(自身を除く): 81106520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 211, 422, 844, 1055, 1688, 2110, 4220, 7621, 8440, 15242, 30484, 38105, 60968, 76210, 152420, 304840, 1608031, 3216062, 6432124, 8040155, 12864248, 16080310, 32160620, 64321240]

約数ペア:

[(1, 64321240), (2, 32160620), (4, 16080310), (5, 12864248), (8, 8040155), (10, 6432124), (20, 3216062), (40, 1608031), (211, 304840), (422, 152420), (844, 76210), (1055, 60968), (1688, 38105), (2110, 30484), (4220, 15242), (7621, 8440)]