21000856

素因数分解:

$2^3\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{1489}}^1$

素因数の和:1579

約数の個数: 32

約数和(自身を含む): 41302800

約数和(自身を除く): 20301944

約数列:

[1, 2, 4, 8, 41, 43, 82, 86, 164, 172, 328, 344, 1489, 1763, 2978, 3526, 5956, 7052, 11912, 14104, 61049, 64027, 122098, 128054, 244196, 256108, 488392, 512216, 2625107, 5250214, 10500428, 21000856]

約数ペア:

[(1, 21000856), (2, 10500428), (4, 5250214), (8, 2625107), (41, 512216), (43, 488392), (82, 256108), (86, 244196), (164, 128054), (172, 122098), (328, 64027), (344, 61049), (1489, 14104), (1763, 11912), (2978, 7052), (3526, 5956)]