21372897

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{991}}^1$

素因数の和:1093

約数の個数: 32

約数和(自身を含む): 35553280

約数和(自身を除く): 14180383

約数列:

[1, 3, 7, 13, 21, 39, 79, 91, 237, 273, 553, 991, 1027, 1659, 2973, 3081, 6937, 7189, 12883, 20811, 21567, 38649, 78289, 90181, 234867, 270543, 548023, 1017757, 1644069, 3053271, 7124299, 21372897]

約数ペア:

[(1, 21372897), (3, 7124299), (7, 3053271), (13, 1644069), (21, 1017757), (39, 548023), (79, 270543), (91, 234867), (237, 90181), (273, 78289), (553, 38649), (991, 21567), (1027, 20811), (1659, 12883), (2973, 7189), (3081, 6937)]