20998305

素因数分解:

$3^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{1427}}^1$

素因数の和:1550

約数の個数: 32

約数和(自身を含む): 37699200

約数和(自身を除く): 16700895

約数列:

[1, 3, 5, 9, 15, 27, 45, 109, 135, 327, 545, 981, 1427, 1635, 2943, 4281, 4905, 7135, 12843, 14715, 21405, 38529, 64215, 155543, 192645, 466629, 777715, 1399887, 2333145, 4199661, 6999435, 20998305]

約数ペア:

[(1, 20998305), (3, 6999435), (5, 4199661), (9, 2333145), (15, 1399887), (27, 777715), (45, 466629), (109, 192645), (135, 155543), (327, 64215), (545, 38529), (981, 21405), (1427, 14715), (1635, 12843), (2943, 7135), (4281, 4905)]