20993913

素因数分解:

$3^2\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{1601}}^1$

素因数の和:1685

約数の個数: 24

約数和(自身を含む): 31988736

約数和(自身を除く): 10994823

約数列:

[1, 3, 9, 31, 47, 93, 141, 279, 423, 1457, 1601, 4371, 4803, 13113, 14409, 49631, 75247, 148893, 225741, 446679, 677223, 2332657, 6997971, 20993913]

約数ペア:

[(1, 20993913), (3, 6997971), (9, 2332657), (31, 677223), (47, 446679), (93, 225741), (141, 148893), (279, 75247), (423, 49631), (1457, 14409), (1601, 13113), (4371, 4803)]