640025955

素因数分解:

$3^4\times 5^1\times {\mathrm{181}}^1\times {\mathrm{8731}}^1$

素因数の和:8929

約数の個数: 40

約数和(自身を含む): 1153776624

約数和(自身を除く): 513750669

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 181, 405, 543, 905, 1629, 2715, 4887, 8145, 8731, 14661, 24435, 26193, 43655, 73305, 78579, 130965, 235737, 392895, 707211, 1178685, 1580311, 3536055, 4740933, 7901555, 14222799, 23704665, 42668397, 71113995, 128005191, 213341985, 640025955]

約数ペア:

[(1, 640025955), (3, 213341985), (5, 128005191), (9, 71113995), (15, 42668397), (27, 23704665), (45, 14222799), (81, 7901555), (135, 4740933), (181, 3536055), (405, 1580311), (543, 1178685), (905, 707211), (1629, 392895), (2715, 235737), (4887, 130965), (8145, 78579), (8731, 73305), (14661, 43655), (24435, 26193)]