19721163

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{1447}}^1$

素因数の和:1527

約数の個数: 32

約数和(自身を含む): 33361920

約数和(自身を除く): 13640757

約数列:

[1, 3, 7, 11, 21, 33, 59, 77, 177, 231, 413, 649, 1239, 1447, 1947, 4341, 4543, 10129, 13629, 15917, 30387, 47751, 85373, 111419, 256119, 334257, 597611, 939103, 1792833, 2817309, 6573721, 19721163]

約数ペア:

[(1, 19721163), (3, 6573721), (7, 2817309), (11, 1792833), (21, 939103), (33, 597611), (59, 334257), (77, 256119), (177, 111419), (231, 85373), (413, 47751), (649, 30387), (1239, 15917), (1447, 13629), (1947, 10129), (4341, 4543)]