21286941

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{97}}^1\times {\mathrm{331}}^1$

素因数の和:461

約数の個数: 32

約数和(自身を含む): 32796288

約数和(自身を除く): 11509347

約数列:

[1, 3, 13, 17, 39, 51, 97, 221, 291, 331, 663, 993, 1261, 1649, 3783, 4303, 4947, 5627, 12909, 16881, 21437, 32107, 64311, 73151, 96321, 219453, 417391, 545819, 1252173, 1637457, 7095647, 21286941]

約数ペア:

[(1, 21286941), (3, 7095647), (13, 1637457), (17, 1252173), (39, 545819), (51, 417391), (97, 219453), (221, 96321), (291, 73151), (331, 64311), (663, 32107), (993, 21437), (1261, 16881), (1649, 12909), (3783, 5627), (4303, 4947)]