30991172

素因数分解:

$2^2\times {\mathrm{61}}^1\times {\mathrm{157}}^1\times {\mathrm{809}}^1$

素因数の和:1031

約数の個数: 24

約数和(自身を含む): 55543320

約数和(自身を除く): 24552148

約数列:

[1, 2, 4, 61, 122, 157, 244, 314, 628, 809, 1618, 3236, 9577, 19154, 38308, 49349, 98698, 127013, 197396, 254026, 508052, 7747793, 15495586, 30991172]

約数ペア:

[(1, 30991172), (2, 15495586), (4, 7747793), (61, 508052), (122, 254026), (157, 197396), (244, 127013), (314, 98698), (628, 49349), (809, 38308), (1618, 19154), (3236, 9577)]