19780761

素因数分解:

$3^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{941}}^1$

素因数の和:982

約数の個数: 48

約数和(自身を含む): 36082368

約数和(自身を除く): 16301607

約数列:

[1, 3, 7, 11, 13, 21, 33, 39, 49, 77, 91, 143, 147, 231, 273, 429, 539, 637, 941, 1001, 1617, 1911, 2823, 3003, 6587, 7007, 10351, 12233, 19761, 21021, 31053, 36699, 46109, 72457, 85631, 134563, 138327, 217371, 256893, 403689, 507199, 599417, 941941, 1521597, 1798251, 2825823, 6593587, 19780761]

約数ペア:

[(1, 19780761), (3, 6593587), (7, 2825823), (11, 1798251), (13, 1521597), (21, 941941), (33, 599417), (39, 507199), (49, 403689), (77, 256893), (91, 217371), (143, 138327), (147, 134563), (231, 85631), (273, 72457), (429, 46109), (539, 36699), (637, 31053), (941, 21021), (1001, 19761), (1617, 12233), (1911, 10351), (2823, 7007), (3003, 6587)]