21661101

素因数分解:

$3^4\times 7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{151}}^1$

素因数の和:204

約数の個数: 80

約数和(自身を含む): 42375168

約数和(自身を除く): 20714067

約数列:

[1, 3, 7, 9, 11, 21, 23, 27, 33, 63, 69, 77, 81, 99, 151, 161, 189, 207, 231, 253, 297, 453, 483, 567, 621, 693, 759, 891, 1057, 1359, 1449, 1661, 1771, 1863, 2079, 2277, 3171, 3473, 4077, 4347, 4983, 5313, 6237, 6831, 9513, 10419, 11627, 12231, 13041, 14949, 15939, 20493, 24311, 28539, 31257, 34881, 38203, 44847, 47817, 72933, 85617, 93771, 104643, 114609, 134541, 143451, 218799, 267421, 281313, 313929, 343827, 656397, 802263, 941787, 1031481, 1969191, 2406789, 3094443, 7220367, 21661101]

約数ペア:

[(1, 21661101), (3, 7220367), (7, 3094443), (9, 2406789), (11, 1969191), (21, 1031481), (23, 941787), (27, 802263), (33, 656397), (63, 343827), (69, 313929), (77, 281313), (81, 267421), (99, 218799), (151, 143451), (161, 134541), (189, 114609), (207, 104643), (231, 93771), (253, 85617), (297, 72933), (453, 47817), (483, 44847), (567, 38203), (621, 34881), (693, 31257), (759, 28539), (891, 24311), (1057, 20493), (1359, 15939), (1449, 14949), (1661, 13041), (1771, 12231), (1863, 11627), (2079, 10419), (2277, 9513), (3171, 6831), (3473, 6237), (4077, 5313), (4347, 4983)]