208909911

素因数分解:

$3^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{71569}}^1$

素因数の和:71718

約数の個数: 16

約数和(自身を含む): 320633600

約数和(自身を除く): 111723689

約数列:

[1, 3, 7, 21, 139, 417, 973, 2919, 71569, 214707, 500983, 1502949, 9948091, 29844273, 69636637, 208909911]

約数ペア:

[(1, 208909911), (3, 69636637), (7, 29844273), (21, 9948091), (139, 1502949), (417, 500983), (973, 214707), (2919, 71569)]