21311255

素因数分解:

$5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{439}}^1$

素因数の和:543

約数の個数: 32

約数和(自身を含む): 31257600

約数和(自身を除く): 9946345

約数列:

[1, 5, 7, 19, 35, 73, 95, 133, 365, 439, 511, 665, 1387, 2195, 2555, 3073, 6935, 8341, 9709, 15365, 32047, 41705, 48545, 58387, 160235, 224329, 291935, 608893, 1121645, 3044465, 4262251, 21311255]

約数ペア:

[(1, 21311255), (5, 4262251), (7, 3044465), (19, 1121645), (35, 608893), (73, 291935), (95, 224329), (133, 160235), (365, 58387), (439, 48545), (511, 41705), (665, 32047), (1387, 15365), (2195, 9709), (2555, 8341), (3073, 6935)]