21785356

素因数分解:

$2^2\times {\mathrm{71}}^1\times {\mathrm{79}}^1\times {\mathrm{971}}^1$

素因数の和:1125

約数の個数: 24

約数和(自身を含む): 39191040

約数和(自身を除く): 17405684

約数列:

[1, 2, 4, 71, 79, 142, 158, 284, 316, 971, 1942, 3884, 5609, 11218, 22436, 68941, 76709, 137882, 153418, 275764, 306836, 5446339, 10892678, 21785356]

約数ペア:

[(1, 21785356), (2, 10892678), (4, 5446339), (71, 306836), (79, 275764), (142, 153418), (158, 137882), (284, 76709), (316, 68941), (971, 22436), (1942, 11218), (3884, 5609)]