21059440

素因数分解:

$2^4\times 5^1\times {\mathrm{67}}^1\times {\mathrm{3929}}^1$

素因数の和:4009

約数の個数: 40

約数和(自身を含む): 49706640

約数和(自身を除く): 28647200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 67, 80, 134, 268, 335, 536, 670, 1072, 1340, 2680, 3929, 5360, 7858, 15716, 19645, 31432, 39290, 62864, 78580, 157160, 263243, 314320, 526486, 1052972, 1316215, 2105944, 2632430, 4211888, 5264860, 10529720, 21059440]

約数ペア:

[(1, 21059440), (2, 10529720), (4, 5264860), (5, 4211888), (8, 2632430), (10, 2105944), (16, 1316215), (20, 1052972), (40, 526486), (67, 314320), (80, 263243), (134, 157160), (268, 78580), (335, 62864), (536, 39290), (670, 31432), (1072, 19645), (1340, 15716), (2680, 7858), (3929, 5360)]