21281805

素因数分解:

$3^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{8297}}^1$

素因数の和:8330

約数の個数: 32

約数和(自身を含む): 39830400

約数和(自身を除く): 18548595

約数列:

[1, 3, 5, 9, 15, 19, 27, 45, 57, 95, 135, 171, 285, 513, 855, 2565, 8297, 24891, 41485, 74673, 124455, 157643, 224019, 373365, 472929, 788215, 1120095, 1418787, 2364645, 4256361, 7093935, 21281805]

約数ペア:

[(1, 21281805), (3, 7093935), (5, 4256361), (9, 2364645), (15, 1418787), (19, 1120095), (27, 788215), (45, 472929), (57, 373365), (95, 224019), (135, 157643), (171, 124455), (285, 74673), (513, 41485), (855, 24891), (2565, 8297)]