18456557

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{59}}^1\times {\mathrm{67}}^1$

素因数の和:185

約数の個数: 32

約数和(自身を含む): 23500800

約数和(自身を除く): 5044243

約数列:

[1, 7, 23, 29, 59, 67, 161, 203, 413, 469, 667, 1357, 1541, 1711, 1943, 3953, 4669, 9499, 10787, 11977, 13601, 27671, 39353, 44689, 90919, 114637, 275471, 312823, 636433, 802459, 2636651, 18456557]

約数ペア:

[(1, 18456557), (7, 2636651), (23, 802459), (29, 636433), (59, 312823), (67, 275471), (161, 114637), (203, 90919), (413, 44689), (469, 39353), (667, 27671), (1357, 13601), (1541, 11977), (1711, 10787), (1943, 9499), (3953, 4669)]