21321195

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{251}}^1\times {\mathrm{809}}^1$

素因数の和:1075

約数の個数: 32

約数和(自身を含む): 39191040

約数和(自身を除く): 17869845

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 251, 753, 809, 1255, 1757, 2427, 3765, 4045, 5271, 5663, 8785, 12135, 16989, 26355, 28315, 84945, 203059, 609177, 1015295, 1421413, 3045885, 4264239, 7107065, 21321195]

約数ペア:

[(1, 21321195), (3, 7107065), (5, 4264239), (7, 3045885), (15, 1421413), (21, 1015295), (35, 609177), (105, 203059), (251, 84945), (753, 28315), (809, 26355), (1255, 16989), (1757, 12135), (2427, 8785), (3765, 5663), (4045, 5271)]