21986235

素因数分解:

$3^4\times 5^1\times {\mathrm{54287}}^1$

素因数の和:54304

約数の個数: 20

約数和(自身を含む): 39413088

約数和(自身を除く): 17426853

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 54287, 162861, 271435, 488583, 814305, 1465749, 2442915, 4397247, 7328745, 21986235]

約数ペア:

[(1, 21986235), (3, 7328745), (5, 4397247), (9, 2442915), (15, 1465749), (27, 814305), (45, 488583), (81, 271435), (135, 162861), (405, 54287)]