28781613

素因数分解:

$3^2\times 7^1\times {\mathrm{461}}^1\times {\mathrm{991}}^1$

素因数の和:1465

約数の個数: 24

約数和(自身を含む): 47663616

約数和(自身を除く): 18882003

約数列:

[1, 3, 7, 9, 21, 63, 461, 991, 1383, 2973, 3227, 4149, 6937, 8919, 9681, 20811, 29043, 62433, 456851, 1370553, 3197957, 4111659, 9593871, 28781613]

約数ペア:

[(1, 28781613), (3, 9593871), (7, 4111659), (9, 3197957), (21, 1370553), (63, 456851), (461, 62433), (991, 29043), (1383, 20811), (2973, 9681), (3227, 8919), (4149, 6937)]