21041720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{75149}}^1$

素因数の和:75167

約数の個数: 32

約数和(自身を含む): 54108000

約数和(自身を除く): 33066280

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 75149, 150298, 300596, 375745, 526043, 601192, 751490, 1052086, 1502980, 2104172, 2630215, 3005960, 4208344, 5260430, 10520860, 21041720]

約数ペア:

[(1, 21041720), (2, 10520860), (4, 5260430), (5, 4208344), (7, 3005960), (8, 2630215), (10, 2104172), (14, 1502980), (20, 1052086), (28, 751490), (35, 601192), (40, 526043), (56, 375745), (70, 300596), (140, 150298), (280, 75149)]