21567147

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{191}}^1\times {\mathrm{283}}^1$

素因数の和:503

約数の個数: 32

約数和(自身を含む): 34897920

約数和(自身を除く): 13330773

約数列:

[1, 3, 7, 19, 21, 57, 133, 191, 283, 399, 573, 849, 1337, 1981, 3629, 4011, 5377, 5943, 10887, 16131, 25403, 37639, 54053, 76209, 112917, 162159, 378371, 1027007, 1135113, 3081021, 7189049, 21567147]

約数ペア:

[(1, 21567147), (3, 7189049), (7, 3081021), (19, 1135113), (21, 1027007), (57, 378371), (133, 162159), (191, 112917), (283, 76209), (399, 54053), (573, 37639), (849, 25403), (1337, 16131), (1981, 10887), (3629, 5943), (4011, 5377)]