20121101

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{20101}}^1$

素因数の和:20132

約数の個数: 16

約数和(自身を含む): 27017088

約数和(自身を除く): 6895987

約数列:

[1, 7, 11, 13, 77, 91, 143, 1001, 20101, 140707, 221111, 261313, 1547777, 1829191, 2874443, 20121101]

約数ペア:

[(1, 20121101), (7, 2874443), (11, 1829191), (13, 1547777), (77, 261313), (91, 221111), (143, 140707), (1001, 20101)]