2780278

素因数分解:

$2^1\times {\mathrm{73}}^1\times {\mathrm{137}}^1\times {\mathrm{139}}^1$

素因数の和:351

約数の個数: 16

約数和(自身を含む): 4289040

約数和(自身を除く): 1508762

約数列:

[1, 2, 73, 137, 139, 146, 274, 278, 10001, 10147, 19043, 20002, 20294, 38086, 1390139, 2780278]

約数ペア:

[(1, 2780278), (2, 1390139), (73, 38086), (137, 20294), (139, 20002), (146, 19043), (274, 10147), (278, 10001)]