21821217

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{97}}^1\times {\mathrm{401}}^1$

素因数の和:529

約数の個数: 32

約数和(自身を含む): 34038144

約数和(自身を除く): 12216927

約数列:

[1, 3, 11, 17, 33, 51, 97, 187, 291, 401, 561, 1067, 1203, 1649, 3201, 4411, 4947, 6817, 13233, 18139, 20451, 38897, 54417, 74987, 116691, 224961, 427867, 661249, 1283601, 1983747, 7273739, 21821217]

約数ペア:

[(1, 21821217), (3, 7273739), (11, 1983747), (17, 1283601), (33, 661249), (51, 427867), (97, 224961), (187, 116691), (291, 74987), (401, 54417), (561, 38897), (1067, 20451), (1203, 18139), (1649, 13233), (3201, 6817), (4411, 4947)]