21015196

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{199}}^1\times {\mathrm{1553}}^1$

素因数の和:1773

約数の個数: 24

約数和(自身を含む): 39160800

約数和(自身を除く): 18145604

約数列:

[1, 2, 4, 17, 34, 68, 199, 398, 796, 1553, 3106, 3383, 6212, 6766, 13532, 26401, 52802, 105604, 309047, 618094, 1236188, 5253799, 10507598, 21015196]

約数ペア:

[(1, 21015196), (2, 10507598), (4, 5253799), (17, 1236188), (34, 618094), (68, 309047), (199, 105604), (398, 52802), (796, 26401), (1553, 13532), (3106, 6766), (3383, 6212)]