21471489

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1\times {\mathrm{101}}^1$

素因数の和:222

約数の個数: 48

約数和(自身を含む): 35642880

約数和(自身を除く): 14171391

約数列:

[1, 3, 9, 13, 23, 39, 69, 79, 101, 117, 207, 237, 299, 303, 711, 897, 909, 1027, 1313, 1817, 2323, 2691, 3081, 3939, 5451, 6969, 7979, 9243, 11817, 16353, 20907, 23621, 23937, 30199, 70863, 71811, 90597, 103727, 183517, 212589, 271791, 311181, 550551, 933543, 1651653, 2385721, 7157163, 21471489]

約数ペア:

[(1, 21471489), (3, 7157163), (9, 2385721), (13, 1651653), (23, 933543), (39, 550551), (69, 311181), (79, 271791), (101, 212589), (117, 183517), (207, 103727), (237, 90597), (299, 71811), (303, 70863), (711, 30199), (897, 23937), (909, 23621), (1027, 20907), (1313, 16353), (1817, 11817), (2323, 9243), (2691, 7979), (3081, 6969), (3939, 5451)]